Weekly Problem 16 - 2012

If the odd numbers on two dice are made negative, which of the totals cannot be achieved?

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 49 - 2013

What is the value of 2000 + 1999 × 2000?

Weekly Problem 50 - 2013

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

Weekly Problem 2 - 2010

Can you solve this 'KANGAROO' alphanumeric subtraction?

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 26 - 2011

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

Weekly Problem 14 - 2008

The numbers 72, 8, 24, 10, 5, 45, 36, 15 are grouped in pairs so that each pair has the same product. Which number is paired with 10?

Weekly Problem 17 - 2009

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

Weekly Problem 47 - 2013

What is the value of the given expression?

Weekly Problem 18 - 2009

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

Weekly Problem 24 - 2009

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

Weekly Problem 40 - 2008

A class raises money for charity by placing 10p pieces edge to edge in a 'silver line'. If the line was 25m long, how much money did they make?

Weekly Problem 27 - 2006

What is the value of c in this subtraction?

Weekly Problem 49 - 2008

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?

Weekly Problem 21 - 2011

How many ways can you paint this wall with four different colours?

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 20 - 2007

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

Weekly Problem 29 - 2007

What is the approximate total volume of platinum that has ever been produced?

Weekly Problem 32 - 2011

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

Weekly Problem 1 - 2008

Given that the number 2008 is the correct answer to a sum, can you find n?

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?

Weekly Problem 44 - 2014

What symbol should be inserted to make the equation true?

Weekly Problem 2 - 2015

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

Weekly problem 50 - 2006

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