You can see it everyday, But cannot touch it at will. What is it?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Only one colour, 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?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

O_er_t_o_

Complete the missing letters of the given word.

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

Can you count the number of lines in the below picture?

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