Can you replace the question mark with the correct number?

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

Solve the puzzle by telling what does below picture means.

Why is the Hole below a Lock?

Which digit occurred maximum times between the number 1 and 1000?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

When monkey rotate the gear, which mark will be hit 1 or 2 ?

Can you place three balls such that the equation shown in the picture holds true?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?