Number Operations - Short Problems

A collection of short Stage 3 and 4 problems on number operations and calculation methods



Weekly Problem 43 - 2011

Challenge Level: Challenge Level:1

The Queen of Hearts has lost her tarts! She asks each knave if he has eaten them, but how many of them are honest...

Weekly Problem 46 - 2011

Challenge Level: Challenge Level:1

Multiply a sequence of n terms together. Can you work out when this product is equal to an integer?

Weekly Problem 1 - 2008

Stage: 3 and 4 Challenge Level: Challenge Level:1

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

Weekly Problem 40 - 2008

Stage: 3 Challenge Level: Challenge Level:1

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 18 - 2009

Stage: 3 Short Challenge Level: Challenge Level:1

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

Weekly Problem 4 - 2010

Stage: 3 Short Challenge Level: Challenge Level:1

Mr Ross tells truths or lies depending on the day of the week. Can you catch him out?

Weekly Problem 12 - 2011

Stage: 3 and 4 Short Challenge Level: Challenge Level:1

How many numbers do you need to remove to avoid making a perfect square?

Weekly Problem 21 - 2011

Stage: 2 and 3 Short Challenge Level: Challenge Level:1

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

Weekly Problem 26 - 2011

Stage: 2 and 3 Short Challenge Level: Challenge Level:1

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

Weekly Problem 32 - 2011

Stage: 2 and 3 Short Challenge Level: Challenge Level:1

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

Weekly Problem 12 - 2014

Stage: 3 and 4 Challenge Level: Challenge Level:1

Weekly Problem 12 - 2014

Weekly Problem 44 - 2014

Stage: 3 and 4 Challenge Level: Challenge Level:1

Weekly Problem 44 - 2014

Weekly Problem 2 - 2015

Stage: 3 and 4 Challenge Level: Challenge Level:1

Weekly Problem 2 - 2015

Weekly Problem 14 - 2015

Stage: 3 Challenge Level: Challenge Level:2 Challenge Level:2

Weekly Problem 14 - 2015

Weekly Problem 16 - 2015

Stage: 3 and 4 Challenge Level: Challenge Level:1

Weekly Problem 16 - 2015

Weekly Problem 19 - 2015

Stage: 3 Challenge Level: Challenge Level:1

Weekly Problem 19 - 2015

Weekly Problem 21 - 2015

Stage: 3 and 4 Challenge Level: Challenge Level:1

Weekly Problem 21 - 2015

Weekly Problem 22 - 2015

Stage: 3 and 4 Challenge Level: Challenge Level:1

Weekly Problem 22 - 2015

Weekly Problem 28 - 2015

Stage: 3 Challenge Level: Challenge Level:1

Weekly Problem 28 - 2015

Weekly Problem 30 - 2015

Stage: 3 and 4 Challenge Level: Challenge Level:1

Weekly Problem 30 - 2015

Weekly Problem 32 - 2015

Stage: 3 Challenge Level: Challenge Level:1

Weekly Problem 32 - 2015

Weekly Problem 50 - 2015

Stage: 3 Challenge Level: Challenge Level:1

Weekly Problem 50 - 2015