During which month do people sleep the least?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

who is silent in the parliament?

What runs around the whole yard without moving?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

What does this Rebus Picture mean?

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even-numbered bulbs - second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth? and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progress similarly.

After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?