Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Prove that the below maths equation is true.

8 + 8 = 91

What does it mean?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

If 21x = 79x, what is the value of x?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?