If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

With the help clues provided in the image, can you find the 5 digit key?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

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?

Replace the question mark with the correct number in the below-given picture?

I have Rs.50 and I spend it in the way as below.

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Find the hidden panda in the image below.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M