You may also like


What is the smallest perfect square that ends with the four digits 9009?

Old Nuts

In turn 4 people throw away three nuts from a pile and hide a quarter of the remainder finally leaving a multiple of 4 nuts. How many nuts were at the start?

Prime AP

What can you say about the common difference of an AP where every term is prime?

Mod 7

Age 16 to 18
Challenge Level

Find the remainder when 3 2001 is divided by 7.