People make me, save me, change me, raise me. What am I?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

Can you make a six-letter word using the letters N, A and B ?

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?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.