The sum of 10 distinct positive integers is 100. What is the largest possible value of one of the numbers?

Each letter stands for a different digit, and S is non-zero. Which letter has the lowest value?

Weekly Problem 16 - 2017

Aroon says his age is 50 years, 50 months, 50 weeks and 50 days old. What age will he be on his next birthday?

Weekly problem 50 - 2006

Can you work out the values of the digits in this addition sum?

Weekly Problem 12 - 2014

Two of the numbers in a 4x4 magic square have been swapped. Can you work out the sum of these numbers?

Can you work out how many quizzes have to be played before we have a winner?

How many hot dogs did this hot dog lover eat on the first day of her binge?

Weekly Problem 44 - 2014

What symbol should be inserted to make the equation true?

Baby can't stand up yet, so we measure her upside down. Can you use our measurements to work out how much Baby has grown in her first year?

77 is multiplied by another two-digit number with identical digits. What is the product?

Weekly Problem 2 - 2015

Can you work out the sum of the missing digits in this subtraction?

What does the sum of these three numbers tell us about their product?

Weekly Problem 16 - 2009

Arrange these three famous mathematicians in order with the shortest-lived first.

Weekly Problem 50 - 2015

Can you work out the values of J, M and C in this sum?

Weekly Problem 49 - 2013

What is the value of 2000 + 1999 × 2000?

Weekly Problem 26 - 2011

Alberta won't reveal her age. Can you work it out from these clues?

Weekly Problem 17 - 2009

How far apart are the first and last bus stops in this bus route?

Weekly Problem 19 - 2016

"It would take 20 million years to fill Morecambe Bay from a bath tap". What does this imply is the approximate capacity of Morecambe Bay?

Weekly Problem 50 - 2013

Each letter in this sum represents a different digit. How many solutions are there?

Use 2 straight lines to split the clock face into 3 parts so that the sums of the numbers in each of the parts are equal.

Can you work out how long it will take for John to walk to and from school?

Weekly Problem 18 - 2009

How much lighter will £5 worth of 5p's be with these new lighter coins?

What is the difference between the sum of the first 2014 odd numbers and the sum of the first 2014 even numbers?

Weekly Problem 42 - 2016

What is the remainder when 354972 is divided by 7?

Weekly Problem 27 - 2006

What is the value of c in this subtraction?

At the beginning and end of Alan's journey, his milometer showed a palindromic number. Can you find his maximum possible average speed?

Can you solve this 'KANGAROO' alphanumeric subtraction?

Weekly Problem 20 - 2007

In this addition each letter stands for a different digit, with S standing for 3. What is the value of YxO?

How many positive two-digit numbers are there whose square and cube both end in the same digit?

Weekly Problem 14 - 2010

What is the largest number of digits that could be erased from this 1000-digit number, to get a surprising result?

Weekly Problem 11 - 2017

Edith had 9 children at 15 month intervals. If the oldest is now six times as old as the youngest, how old is her youngest child?

How many questions did Sarah answer correctly in this multiple choice exam?

Jane accidentally multiplied by 54 instead of 45, and her answer was 198 too big. What number did she multiply 54 by?

Can you work out the solution to this tricky summation problem?

Weekly Problem 32 - 2011

What could be the scores from five throws of this dice?

Weekly Problem 33 - 2011

How many solutions can you find to this sum? Each of the different letters stands for a different number.

Weekly Problem 3 - 2017

Books cost £3.40 and magazines cost £1.60. If Clara spends £23 on books and Magazines, how many of each does she buy?