Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

What does below rebus means ?

A sundial has the fewest moving parts of any timepiece. Which has the most?

What came first, the chicken or the egg?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.