What has to be broken before you can use it?

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?

What am I?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

What does this mean?

CCCCCCC

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.