HOW MANY TRIANGLES?

There are 12 ‘small’ triangles, 6 ‘medium’ triangles (made up of four small ones) and 2 ‘large’ triangles (made up of nine small ones), making a total of 20 triangles.

MISSING NUMBER

To calculate the number in the centre, and the two numbers in the bottom corners and divide by the top number. 14+6=20 and 20÷4=5 so the missing number is 5.

HOW MANY RECTANGLES?

This one is very tricky. There are a total of 26 rectangles, most of them hidden. Did you find them all?

MIND GYM

Easy: 64
Medium: 194
Hard: 7734