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Rick has five cubes, each one 2cm taller than the previous one. The largest is the same height as a tower built of the two smallest. How high would a tower of all five cubes be?

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The sum of 9 consecutive positive whole numbers is 2007. What is the largest of these numbers?

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How old will Julie be when her age is equal to the sum of her daughters' ages?

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Amy misread a question and got an incorrect answer. What should the answer have be?

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Paul is 32 years old. In ten years time, Paul's age will be the sum of the ages of his three sons. What do his sons' ages add up to now?

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What is the first term of a Fibonacci sequence whose second term is 4 and fifth term is 22?

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The sum of five consecutive integers is equal to the sum of the next three consecutive integers. Can you find the largest of these integers?

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After performing some operations, what number is your answer always a multiple of?

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Three numbers add up to 100. The difference between the larger two is 12 and the difference between the smaller two is 2. What are the numbers?

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These are the results when 3 numbers were added in pairs. What were the numbers?

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Clement and Dmitri both measure how much taller they are than the other when standing on a table. Can you work out how tall the table is?

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Think of any whole number. Each time you perform a sequence of operations on it, what do you notice about the divisors of your answer?

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In the diagram, the number in each box is obtained by adding the two immediately below. What is the number in the top box?

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When asked how old she was, the teacher replied: My age in years is not prime but odd and when reversed and added to my age you have a perfect square...

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What is the smallest number Anastasia could have thought of, if after performing some operations, the total is a square number?

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Seventy pupils are divided into two groups. Can you work out the difference between the number of boys in group 1 and the number of girls in group 2?

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25 of the storeys of a 50 storey building are painted gold, and the rest are painted black...

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The area of a rectangle is 225 square units. Find its width.

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

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Can you find the volume of a cuboid, given its perimeters?

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What is the value of $2015 \times 2017 - 2016 \times 2016$?

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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?

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Can you show this algebraic expression is divisible by 4?

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Brian chooses an integer and operates on it. Work out the largest integer that he could have chosen.

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Find four integers whose sum is 400 and such that the first integer is equal to twice the second integer, three times the third integer and four times the fourth integer.

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Find the shortcut to do this calculation quickly!

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The fifth term of a Fibonacci sequence is 2004. If all the terms are positive integers, what is the largest possible first term?

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What are the possible lengths for the third side of this right-angled triangle?

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How much money did the pensioner have before being robbed?

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The product of Mary's age at her last birthday and her age in complete months is 1800. How old is Mary?

Challenge Level

Can you work out how many members this choir has from these percentages?