A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

I have no life, but I can die. What am I?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Solve the mathematical equation in the picture below.

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

Solve the counting riddle by identifying the number of triangles in the given picture.

Can you decipher the below rebus?

PBLUESAISNUERSES

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Name a key which is hardest to turn.