Two gems from the wizard of recreational maths

UPDATE: Puzzle solutions can be read here.

Today’s column is a celebration of John Horton Conway, the legendary British mathematician, who died of coronavirus earlier this month, aged 82.

Conway was an inspirational, iconoclastic genius who invented and studied countless puzzles and games, in addition to his more highbrow work in group theory, number theory, geometry, topology and many other fields.

The answers to today’s puzzles

Earlier today I set you two puzzles that the late John Horton Conway suggested for this column:

1) The Miracle Builders

Puzzles for kids in quarantine

Update: Solutions can now be read here.

Today’s teasers are from my new puzzle book, Football School: the Ultimate Puzzle Book, which is aimed at 8 to 13-year-olds. No pressure. I have extracted some of the problems that I thought might also provide entertainment for grown-ups.

We kick off with a problem for everyone tending their lawns, plant pots, and window boxes during lockdown.

The solutions to today’s puzzles

Earlier today I set you the following four puzzles from my new book, Football School: the Ultimate Puzzle Book:

1. Which of these two watering cans can carry the most water?

Friends and colleagues pay tribute to gifted polymath whose achievements spanned biology, physics and public policy

• Lord May of Oxford obituary

Pioneering Australian scientist Robert May, whose work in biology led to the development of chaos theory, has died at age 84.

Known as one of Australia’s most accomplished scientists, he served as the chief scientific adviser to the United Kingdom, was president of the Royal Society, and was made a lord in 2001.

As hay fever season approaches, Nicola Davis asks Prof Stephen Durham about the differences between the immune response to an allergen, such as pollen, and a pathogen, like Sars-CoV-2. Should those with allergies should be concerned about Covid-19?

Lawyers say failure to provide adequate PPE may amount to corporate manslaughter

• Coronavirus – latest updates
• See all our coronavirus coverage

The deaths of more than 50 hospital and care home workers have been reported to Britain’s health and safety regulator, which is considering launching criminal investigations, the Guardian has learned.

The Health and Safety Executive (HSE), which investigates the breaking of safety at work laws, has received 54 formal reports of deaths in health and care settings “where the source of infection is recorded as Covid-19”. These are via the official reporting process, called Riddor: Reporting of Injuries, Diseases and Dangerous Occurrences.

Sage told widespread use of antibody tests could lead to criminal behaviour, papers reveal

• Coronavirus – latest updates
• See all our coronavirus coverage

Downing Street’s scientific advisers feared people might intentionally seek to contract coronavirus and that a black market in fake test results could emerge if employers allowed workers to return only when they had a positive antibody test.

The Scientific Advisory Group for Emergencies, known as Sage, was warned last month by its behavioural psychology subgroup that the widespread introduction of antibody tests could lead to a range of potentially dangerous and even criminal “negative behavioural responses” if not handled well.

A man whose wife was killed in the April mass shooting in Nova Scotia is the plaintiff named in a proposed class-action lawsuit against the estate of the deceased gunman, denturist Gabriel Wortman.

Alberta's police watchdog have released new details about an armed confrontation that left one person dead and a police officer seriously injured.

There is now an outbreak of COVID-19 linked to Canada Post's main plant in Calgary, according to Alberta Health Services.

Smart Education And Learning Market Size, Share & Trends Analysis Report By Age, By Component (Hardware, Software, Service), By Learning Mode, By End User, By Region, And Segment Forecasts, 2020 - 2027Read the full report: https://www.reportlinker.com/p05891723/?utm_source=PRN The global smart education and learning market size is expected to reach USD 680.1 billion by 2027. The market is anticipated to witness a CAGR of 17.9% from 2020 to 2027. Demand for smart education and learning solutions is increasing among the growing population in corporate and academic sectors, owing to benefits such as improved education quality and easy access to educational content. Increasing adoption of consumer electronics, such as smartphones, e-readers, laptops, and e-learning applications, has altered conventional education methodology and has enhanced the efficiency of an individual to learn. Additionally, there are enormous opportunities for advancements in the market, owing to improved internet accessibility.Also, the COVID - 19 outbreak has emerged an opportunity for the market with an increasing number of states and countries closing educational institutes. For instance, over 90.0% of the world's students are not attending their schools due to this pandemic, as mentioned by UNESCO (The United Nations Educational, Scientific, and Cultural Organization). Commonwealth of Learning (COL), an intergovernmental organization of The Commonwealth (Canada), has supported educational institutions and governments in building robust distance education solutions for quality e-learning practices. However, lack of awareness among end-users about the latest technologies and inadequate amount of resources for delivering quality education in developing regions is anticipated to hinder market growth.The simulation-based learning segment is anticipated to exhibit the highest CAGR because this mode enables corporate professional and educational institutions to create a realistic experience in a controlled environment.It also allows professionals and learners to practice, navigate, explore, and obtain more information through a virtual medium before they start working on real-life tasks.Growing awareness among people and the rising popularity of smart education are encouraging solution providers to invest in research and development for creating more reliable, better, and cost-effective solutions. Manufacturers are making substantial investments in developing new products for enhancing the user experience.Smart education and learning market report highlights:• Growing demand for smart educational practices can be accredited to factors, such as reducing expenses of online training, curbing geographic challenges in physically attending classes, and time constraints faced by aspirants• Increasing penetration of the Internet of Things (IoT), enhanced internet accessibility, and rapid adoption of mobile technology have encouraged users to adopt smart education and learning solutions• Innovative techniques, such as gamification, Massive Open Online Courses (MOOCs), microlearning, and adaptive learning, which improve the overall educational process, are expected to drive the market over the projected period• North America accounted for the largest market share in 2019 owing to its large consumer base for e-learning methodsRead the full report: https://www.reportlinker.com/p05891723/?utm_source=PRN About Reportlinker ReportLinker is an award-winning market research solution. Reportlinker finds and organizes the latest industry data so you get all the market research you need - instantly, in one place. __________________________ Contact Clare: clare@reportlinker.com US: (339)-368-6001 Intl: +1 339-368-6001

Hackers linked to Iran have targeted staff at U.S. drugmaker Gilead Sciences Inc in recent weeks, according to publicly-available web archives reviewed by Reuters and three cybersecurity researchers, as the company races to deploy a treatment for the COVID-19 virus. In one case, a fake email login page designed to steal passwords was sent in April to a top Gilead executive involved in legal and corporate affairs, according to an archived version on a website used to scan for malicious web addresses. Ohad Zaidenberg, lead intelligence researcher at Israeli cybersecurity firm ClearSky, who closely tracks Iranian hacking activity and has investigated the attacks, said the attempt was part of an effort by an Iranian group to compromise email accounts of staff at the company using messages that impersonated journalists.

A hard Brexit is more likely due to the coronavirus crisis because Britain and the European Union have made so little progress in talks, Germany's foreign minister has said. Heiko Maas said that negotiations between Britain and the EU so far on the future trade relationship had yielded few gains with the UK disregarding the political declaration, which he said was "simply not on". Britain left the EU in January, and talks with the bloc are now focused on setting new trading terms from 2021, when London's status-quo transition period ends. However, the talks quickly hit an impasse when negotiations resumed last month, according to diplomats and officials. "It's worrying that Britain is moving further away from our jointly agreed political declaration on key issues in the negotiations," Mr Maas told the Augsburger Allgemeine newspaper. "It's simply not on, because the negotiations are a complete package as it's laid out in the political declaration." Mr Maas said there was currently neither common ground on how to shape a comprehensive trade deal or on whether to extend the negotiation period beyond the end of the year. "The British government is still refusing to extend the deadline," Mr Maas said. "If it stays that way, we will have to deal with Brexit in addition to the coronavirus at the turn of the year." Simon Coveney, Ireland's foreign minister, said on Friday that the coronavirus pandemic had made an already difficult timeline for a British-European Union trade deal "virtually impossible" and that it would make sense to seek more time.

Arriving at his retirement home, he immediately went into self-isolation with his wife of 55 years, Jean, who has shown no symptoms of the virus. Embleton, who received an MBE honor from Queen Elizabeth II in 1993 for outstanding service to the Royal Navy, thinks the lockdown rules are too strict for some elderly people.

Russian President Vladimir Putin marked Victory Day, the anniversary of the defeat of Nazi Germany in World War II, in a ceremony shorn of its usual military parade and pomp by the coronavirus pandemic. In neighboring Belarus, however, the ceremonies went ahead in full, with tens of thousands of people in the sort of proximity that has been almost unseen in the world for months. Victory Day is Russia’s most important secular holiday and this year’s observance had been expected to be especially large because it is the 75th anniversary, but the Red Square military parade and a mass procession called The Immortal Regiment were postponed as part of measures to stifle the spread of the virus.

President Vladimir Putin told Russians they are "invincible" when they stand together as the country on Saturday marked the 75th anniversary of the end of World War II in lockdown from the coronavirus. With cases surging and authorities urging Russians to stay in their homes, celebrations of this year's Victory Day were muted after the Kremlin grudgingly postponed plans for a grand parade with world leaders. Instead of columns of military hardware and thousands of troops marching through Red Square as planned, Putin walked alone to lay flowers at the Eternal Flame outside the red brick walls of the Kremlin.

Many people saw more than the last moments of Ahmaud Arbery's life when a video emerged this week of white men armed with guns confronting the black man, a struggle with punches thrown, three shots fired and Arbery collapsing dead. The Feb. 23 shooting in coastal Georgia is drawing comparisons to a much darker period of U.S. history — when extrajudicial killings of black people, almost exclusively at the hands of white male vigilantes, inflicted racial terror on African Americans. It frequently happened with law enforcement complicity or feigned ignorance.

Form requires sensitive data, including driver’s license and voided check scan.

Advanced hacker group seeded market with at least 8 apps likely since 2016.

There's a scramble to adapt to a world where people routinely cover their faces.

Firings highlight “toxicity running through the company culture,” Bray said.

Devices will stop working for users who don't want to pay the new monthly fee.

Learn to get the most out of your ZFS filesystem in our new series on storage fundamentals.

"I just always want to reiterate the spiders are our friends, and this isn't a dangerous spider," said Royal B.C. Museum entomologist Claudia Copley.

In one of my latest reports (Key Criteria for Evaluating Unstructured Data Management), one of the key criteria was the availability of…

What is Value Stream Management? Value Stream Management (VSM) is the TLA du jour among software development tools, so is it relevant…

A video interview with Canada’s AI secretary general on crisis and opportunity. 

Related Stories

• China and the Pandemic: Talking with Historian Timothy Brook (in News)
• Bill McKibben Talks COVID-19 and Climate Change (in News)
• All about COVID-19 with Physician and Writer Kevin Patterson (in News)

And other stories from around the world.

Mission is remembered as perhaps Nasa's finest, and most desparate, hour

'By expanding our thinking of how oceans behaved in the past, we could gain some insights into oceans today,' says scientist at Stanford University

Experiment in mice indicates exercise provides high level of protection from cancer, even among those with diabetes and obesity

Scientists have made a major breakthrough that could help us understand the origin of our universe, they say.

The remote working stakes have just gone up a notch

More than 500 people enrol to test jab following trials in animals

And other stories from around the world

Widespread and quick use would be key to battling spread of virus, study says

Exclusive: The key evidence for his high status is the unusually fine material buried with him for his journey to the next life, writes David Keys

Infowars founder Alex Jones among conspiracy theorists sowing doubts about pandemic

Stop the Wildlife Trade: From 1918 to today, the deadly diseases that have become more frequent

'This type of natural manipulation in ecosystems ... has barely been researched to date, but holds tremendous potential,' says researcher

Nasa and the European Space Agency have shared new images of Comet Atlas as it flies towards Earth.

Greasy food and Bloody Marys not cutting through the wretchedness? Try this instead

'Reinvention' of ceramics firing process could be used by artificial intelligence to create new materials with wide range of possible applications

David Keys speaks to scientists and health experts about the new tools that could help in the fight against Covid-19 and future coronavirus outbreaks

Extremely high-resolution imagery allowed researchers to 'read' rocks on planet surface

First and last names, email addresses, gender and sexual orientation, and credit card information of models and users was left on an insecure server