Magic Math

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?




Similar Math Riddles

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

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What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

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A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

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On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

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In a classic wine shop, the list of three most popular wines are:
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There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

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Can you find the least possible number such that

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If the number is divided by 4, it gives the remainder of 2;
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There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

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John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

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There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

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Amazing Facts

Word ladder puzzle

The word ladder puzzle was invented by Lewis Carroll, author of Alice’s Adventures in Wonderland.