When purchased together, a pair of binoculars and the case cost $100. If the binoculars cost $90 more than the case, how much does the case cost?

Riddle Answer# Interview Riddles

## Five Pieces of Chain

A man has 5 pieces of chain that must be joined into a long chain. He can open ring 3 (first operation), link it to ring 4 (second operation), then unfasten ring 6 and link it to ring 7, and so on.

He could complete his task in 8 operations, but he wants to do it in 6. How does he do it?

Riddle Answer## 100 Coins Puzzle

You walk into a dark room in which 100 coins are scattered around on the floor. 10 of them are heads up, 90 are tails up.

You cannot feel, see or in any other way find out on which side the coins are. How can you split the coins into two piles such that there are the same number of heads in each pile?

Riddle Answer## Cashierâ€™s Puzzle

An engineer goes to a bank with a check of $200 and asks the cashier “Give me some one-dollar bills, ten times as many twos and the balance in fives!”

What will the cashier do?

Riddle Answer## 21 Barrels Problem

There are 21 barrels of wine with a farmer. 7 are full, 7 are half full and 7 are empty. He wishes to divide them among his three sons such that each son has the same number of full barrels, the same number of half full barrels, and the same number of empty barrels. Note that there are no measuring devices handy. How can the barrels and wine be evenly divided?

Riddle Answer