What occurs twice in a week, once in a year but never in a day?

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.

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

Can you divide the below-given shape into four equal and identical pieces?

Take one out and scratch my head, I am now black but once was red. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

I have branches, but no fruit, trunk or leaves. What am I?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?