Measure by Hourglass

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?




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By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

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Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

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Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

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Sweet & very intelligent katty has 8 puppets(Jane Bird Barbie Angel Colleen Nora Lass Missy).
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Also some puppets are inside the bigger puppets.

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A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

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I will give you 4 clues about the cards:

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Clue 3: There is no card of an ace.
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Crossword puzzles

In the 1920s, people feared that crossword puzzles would contribute to illiteracy.