Unlock the Vault
One day a robber got into a bank to rob its vault. However, he noticed that the vault had an unusual lock. So he hid behind a desk and watched how others got in. He noticed that the manager came up to the vault door and pressed a button. The lock read out a number in response to which the manager said a number of his own. On doing so the door opened. This happened twice. The first time the lock said 12 and the manager responded with 6. The second time the lock said 6 and the manager responded with 3. Believing that now he knew all that he needed to know, the robber approached the door. The door said 10 and in reply the robber entered 5. It set of the alarm and the robber was apprehended.
What number do you think the robber should have said?
The robber should have said 3 (three) – the number of letters in the number the vault said.
Your Answer
More puzzles to try-
Pears on a tree
There were two pairs hanging on a tree, one man walked by and took a pair. Soon after a second ...Read More »Key Hardest to Turn
Name a key which is hardest to turn.Read More »Cycle race interesting riddle
You are cycling in a 5000 meter cycle race and you overtake the last person. What place are you in ...Read More »Shorter when you make it big
What five-letter word becomes shorter when you add two letters to it?Read More »school sports riddle
During the recent Puzzlefry school sports day, four girls were competing in the 400 meters hurdles. Official figures mysteriously went ...Read More »Count The Squares
Find the number of squares in the below-given picture.Read More »Play for coin puzzle
There are ‘n’ coins in a line. (Suppose n is even). Two players take turns to take a coin from ...Read More »Bee but no Honey
I have an eye but am blind, am a sea, but no water; Am a bee, but no honey; Tea ...Read More »Harder to Catch the Faster You Run
What is harder to catch the faster you run?Read More »Find the weight of all rabit, dog and cat math puzzle
Find the weight of all rabit, dog and cat in the picture belowRead More »What is the next two rows of numbers?
The below is a number puzzle. It should be read left to right, top to bottom. 1 1 1 2 ...Read More »Three ways and monk questioning riddle
You are walking down the road trying to find enlightenment when you come to a monk and a three-way fork ...Read More »Complete the Series Puzzle
Complete the series by replacing \”?\” with the correct number. ST ND RD TH \’?\’Read More »Orange distribution tricky puzzle
A basket containing twenty Oranges is with you. You have twenty members in your family, each desire an orange. You ...Read More »Josephus problem – Sword Killing and Survival Puzzle
100 people are standing in a circle in an order of 1 to 100. No.1 has a sword he kills ...Read More »How can this be possible, Can you solve the mystry?
Jamie looked at his reflection on the window mirror of the 45th floor. Driven by an irrational impulse, he made ...Read More »Taller than you riddle
Tell the word used to greet, and also used to describe something taller than you ?Read More »Man’s Name ?
While walking down the street I met a man. He tipped his hat and drew his cane and in this ...Read More »MatchSticks Squares Riddle
You need to move three matchsticks to form three squares. Can you do it?Read More »Animal in the mystorious Picture
Can you find and name the animal hidden in the picture below?Read More »