Can you find out the missing number in the grid?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I have teeth but i don't bite. Who Am I ?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

How far can you walk into the woods?

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

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

My thunder comes before lightning.
My lightning comes before my rain.
My rain dries up all the land it touches.

Who am I?