There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

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

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

What is the coolest letter in the alphabet?

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?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

I’m tall when I’m young, and I’m short when I’m old. What am I?

I look at you, you look at me, I raise my right, you raise your left. What am I?