What is common among 11, 69, and 88?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

What do you see in the given picture?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

How many bananas can you eat if your stomach is empty?

How is a fly different from a mosquito?

Find the next number in the series.
1 10 24 43 67 ?

Can you place three balls such that the equation shown in the picture holds true?

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

which number am I?