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236
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There are 2 trees in a garden (tree “A” and “B”) and on the both trees are some birds.
The birds of tree A say to the birds of tree B that if one of you comes to our tree, then our population will be the double of yours.
Then the birds of tree B tell to the birds of tree A that if one of you comes here, then our population will be equal to that of yours.
How many birds in each tree?
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One day a man jumped from a plane without a parachute and suffered no injuries, how is that possible?
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A man kills his wife and hides the body in some bushes. The next day the police call and say his wife has been murdered and tell the man to come to the crime scene right away. As soon as the man gets there he is arrested. Why?
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What can you hold in your left hand but can never hold in your right hand?
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Use the numerals 1, 9, 9 and 6 exactly in that order to make the following numbers: 28, 32, 35, 38, 72, 73, 76, 77, 100 and 1000
You can use the mathematical symbols +, -, ×, /, √, ^ (exponent symbol) and brackets.
Example: 1×9+9×6 = 63
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Three sisters are identical triplets. The oldest by minutes is Aliza, and Aliza always tells anyone the truth. The next oldest is Benedicta, and Benedicta always will tell anyone a lie. Cerena is the youngest of the three. She sometimes lies and sometimes tells the truth.
John, an old friend of the family’s, came over one day and as usual he didn’t know who was who, so he asked each of them one question.
John asked the sister that was sitting on the left, “Which sister is in the middle of you three?” and the answer he received was, “Oh, that’s Aliza.”
John then asked the sister in the middle, “What is your name?” The response given was, “I’m Cerena.”
John turned to the sister on the right, then asked, “Who is that in the middle?” The sister then replied, “She is Benedicta.”
This confused John; he had asked the same question three times and received three different answers.
Who was who?
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The circumference of the Earth is approximately 40,000 kilometers, and someone has just made a metal band that circles the Earth, touching the ground at all locations.
You come along at night, as a practical joke, and add just 10 meters to its length (one hundredth of one kilometer !)
It is now one four-millionth longer, and sits magically just above the ground at all locations
How far has it risen … could a flea, a rabbit or even a man squeeze underneath it?
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The cold faucet in a bath lets the water in at the rate of 15 litres per minute.
The hot faucet fills the bath at the rate of 10 liters per minute.
The plug hole lets the water out of the bath at the rate of 12 liters per minute.The bath holds a maximum of 520 liters.
I turn both faucets on, but forget to put the plug in. How many minutes does it take for the bath to overflow?
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According to the traditional song, on the first day of Christmas (25th December), my true love sent to me:
. A partridge in a pear tree
On the second day of Christmas (26th December), my true love sent to me THREE presents:
. Two turtle doves
. A partridge in a pear treeOn the third day of Christmas (27th December and so on) my true love sent to me SIX presents:
. Three French hens
. Two turtle doves
. A partridge in a pear treeThis carries on until the the twelfth day of Christmas, when my true love sends me:
Twelve drummers drumming
Eleven pipers piping
Ten lords a-leaping
Nine ladies dancing
Eight maids a-milking
Seven swans a-swimming
Six geese a-laying
Five gold rings
Four calling birds
Three French hens
Two turtle doves
A partridge in a pear treeAfter the twelve days of Christmas are over, how many presents has my true love sent me altogether?
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