There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Can you find out who is the kidnapper in below Picture and why, Explain ?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

What Does this text mean:

important=important

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

You need to remove four matchsticks from the picture below and still need to maintain the following as in the original image.
1. 1st row contains 12 matchsticks
2. 2nd row contains 12 matchsticks
3. 1st column contains 12 matchsticks
4. 2nd column contains 12 matchsticks

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

Next Number in the Series,

5, 16, 49, 104, ?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

Move four matchsticks to the below square to form three squares?