What is next number in the pattern below:

131 517 192 123 ?

Count the Triangle in the figure given below:

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

There was a kingdom in which the king had no heir to take over his thrown. Even the queen was dead and he himself was on the verge of dying. He thought about it and then summoned all of the teenagers. He gave one seed each to all of them and asked them to grow the plant. He announced that the one with the most beautiful plant will become the king/queen of the empire after the death of the king.

After a month, all of them were called. The king looked at all of the plants but announced the girl with an empty pot as the queen of the empire. Why?

The more you take me, the more you leave me behind.
Who Am I?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

You need to move three matchsticks to form three squares. Can you do it?