Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

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

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

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

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

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

You visit a home for specially-abled children on the occasion of Christmas where you meet with 50 children. You have a box of chocolates containing 50 chocolates exactly.

What if you were asked to one chocolate to each child in a manner that one chocolate still remains in the box? Is it possible?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?