What a Math

If 21x = 79x, what is the value of x?




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John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

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We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

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Rectify the following equality 101 - 102 = 1 by moving just one digit.

Mathematical Signs Magic

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A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

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A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

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A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

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Can you find out how much did the youngest one receive?

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How many triangles are there on the puzzle below?

Let

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I am a prime number.
The double of myself is equal to the square of me.

which number am I?

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Find the value of "?" in the ball picture Riddle below:

Missing Ball Sequence

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Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

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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