Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

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

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?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

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

Solve The below Equation:

ALFA + BETA + GAMA = DELTA