Number Game

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?




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The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

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In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

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A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

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Which number should replace the question mark?

Triangular Logic

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I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

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Sweet & very intelligent katty has 8 puppets(Jane Bird Barbie Angel Colleen Nora Lass Missy).
All puppets are of different size. She arrange all puppets to face towards the guest and tell the guess the following clues :

* Jane has three puppets bigger on its left side
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* Angel has two puppets smaller on its right side
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Also some puppets are inside the bigger puppets.

Assuming you are the guest , can you tell the katty how the puppets are arranged ?

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You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

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In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

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There was a strange boy who was born before his father. How can this be possible?

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In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki