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

which number am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

What is the next number in this matchsticks series riddle?

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?

Remove two matchsticks to make the below equation correct.

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

No one wants to have it, but if one got it, he does not want to lose it. What is It?