A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Can you count the number of triangles in the picture below?

In the four images below, can you find the odd one out?

I’m tall when I’m young, and I’m short when I’m old. What am I?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What does it mean?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you write down eight eights so that they add up to one thousand?