You may also like

problem icon


What are the missing numbers in the pyramids?

problem icon

Tweedle Dum and Tweedle Dee

Two brothers were left some money, amounting to an exact number of pounds, to divide between them. DEE undertook the division. "But your heap is larger than mine!" cried DUM...

problem icon


The well known Fibonacci sequence is 1 ,1, 2, 3, 5, 8, 13, 21.... How many Fibonacci sequences can you find containing the number 196 as one of the terms?

Months and Years

Stage: 3 Short Challenge Level: Challenge Level:1
Mary was 12 on her last birthday.

We need to express 1800 as the product of two factors, one of which (her age in months) is between twelve and thirteen times the other (her age in complete years).

These are 150 and 12 respectively.

Mary is now 150 months old, i.e. she was twelve on her last birthday and she is now 12 years 6 months old

This problem is taken from the UKMT Mathematical Challenges.
View the archive of all weekly problems grouped by curriculum topic

View the previous week's solution
View the current weekly problem