What is always in front of you but can’t be seen?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Keyboard words are not in alphabetical order, Why?

Prove that the below maths equation is true.

8 + 8 = 91

Can you decipher the below rebus?

PBLUESAISNUERSES

What is the coolest letter in the alphabet?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

You need to remove two matchsticks to make the below equation true. Can you do it ?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

Can you fill the blank with the correct number?

6 30 870 756030 _____