It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you find out the missing number in the grid?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

10+10 and 11+11 can give you the same answer.

Explain how?

What is the next number in this matchsticks series riddle?

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?