Challenge Level

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

Challenge Level

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

Challenge Level

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?

Challenge Level

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

Challenge Level

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?

Challenge Level

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

Challenge Level

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?

Challenge Level

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?

Challenge Level

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

Challenge Level

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?

Challenge Level

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

Challenge Level

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...

Challenge Level

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

Challenge Level

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

Challenge Level

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?

Challenge Level

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

Challenge Level

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?

Challenge Level

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

Challenge Level

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?

Challenge Level

Can you show this algebraic expression is divisible by 4?

Challenge Level

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

Challenge Level

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.

Challenge Level

Find the shortcut to do this calculation quickly!

Challenge Level

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

Challenge Level

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

Challenge Level

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

Challenge Level

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

Challenge Level

How much money did the pensioner have before being robbed?

Challenge Level

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?

Challenge Level

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