Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

There was a strange boy who was born before his father. How can this be possible?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

Can you write down eight eights so that they add up to one thousand?

What has 13 hearts but no other organs?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?