Weekly Problem 22 - 2015

The number 2005 is the sum of a sequence of five consecutive positive integers. What is the smallest of these integers?

Weekly Problem 28 - 2011

Look at the times that Harry, Christine and Betty take to pack boxes when working in pairs, to find how fast Christine can pack boxes by herself.

Weekly Problem 37 - 2012

Baldrick could buy 6 parsnips and 7 turnips, or 8 parsnips and 4 turnips. How many parsnips could he buy?

Weekly Problem 7 - 2009

Tony and Tina can't work out which of them owes what to the other. Can you?

Weekly Problem 22 - 2016

Given some relationships amongst these shapes, how many triangles equal one diamond?

Weekly Problem 15 - 2009

Can you work out Ali's age based on the diagram?

Weekly Problem 48 - 2009

Dan and Ann have 9 and 8 coins respectively. What is the smallest number of coins they must swap so they end up with equal amounts of money.

Weekly Problem 41 - 2011

This magic square has only been partially completed. Can you still solve it...

Weekly Problem 50 - 2014

Cheryl finds a bag of coins. Can you work out how many more 5p coins than 2p coins are in the bag?

Weekly Problem 13 - 2010

The Seven Dwarfs have seven different birthdays. How old can they be?

Weekly Problem 40 - 2017

After tennis training, Andy, Roger and Maria collect up the balls. Can you work out how many Andy collects?

Weekly Problem 51 - 2011

The equation $x^2+2=y^3$ looks nearly quadratic. What integer solutions can you find?

Weekly Problem 50 - 2007

Al, Bertie, Chris and Di have sums of money totalling £150... What is the difference between the amount Al and Di have?

Weekly Problem 22 - 2014

The planet Zog has both green and blue banknotes. Can you work out how many zogs two green banknotes and three blue banknotes are worth?

Weekly Problem 38 - 2012

If an athlete takes 10 minutes longer to walk, run and cycle three miles than he does to cycle all three miles, how long does it take him?

Weekly Problem 14 - 2017

The numbers 2 up to 8 are to be placed in the diagram on the right such that the row and column add up to 21. Which numbers can replace x?

Weekly Problem 40 - 2011

You may have seen magic squares before, but can you work out the missing numbers on this magic star?

Weekly Problem 36 - 2017

What value of x makes the mean of the first three numbers in this list equal to the mean of the other four?

Weekly Problem 2 - 2011

Using the new operator $\oplus$, can you solve this equation?

Weekly Problem 49 - 2017

Each interior angle in a quadrilateral (apart from the smallest) is twice the previous one. What is the size of the smallest interior angle?

Weekly Problem 44 - 2013

If you know that a fraction of X is the same as a different fraction of Y, can you work out X/Y?

Weekly Problem 36 - 2015

Can you complete this magic square with the numbers from 7 to 15?

Weekly Problem 24 - 2014

The square of a positive number is twice as big as the cube of that number. What is the number?

Weekly Problem 10 - 2015

Granny is four times as old as I am. Five years ago she was five times as old as I was. What is the sum of our ages?

Weekly Problem 42 - 2014

If $6x−y=21$ and $6y−x=14$, what is the value of $x−y$?