Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

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

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

What breaks yet never falls, and what falls yet never breaks?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Why are all black people so quick ?