Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

I ask Joseph to pick any 5 cards out of a deck with no Jokers.

He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Jack can't see any of this). I look at the cards and I pick 1 card out and give it back to Joseph. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Jack.

Jack looks at the 4 cards i gave him, and says out loud which card Joseph is holding (suit and number). How?

The solution uses pure logic, not sleight of hand. All Jack needs to know is the order of the cards and what is on their face, nothing more.

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What begins with T, ends with T, and has T in it?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

What kind of storm is always in a rush?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

Which is faster, Heat or Cold ? Explain.

What occurs twice in a week, once in a year but never in a day?