A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

What runs around the whole yard without moving?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

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

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Find the next number in the series below

21 32 54 87 131 ?

What is more useful when it is broken?

Which point will the car reach to go out?