#### Math Puzzles Question & Answers

# Puzzle : Identical Balls

#### Additional Details

There are 8 identical balls. In that one of the ball is overweight. There are only two chances to weigh in the weighing machine. How to find the overweight ball?

First weigh 3 against 3 balls. If the ball contains among these six balls, then take the three balls which weighed over, and weigh the ball 1 against 1. If the balls are not equal and any one of the ball weighs more, that is the overweight ball, else the one among the three which is not weighed is the ball. If the 3 against 3 balls were equal, then weigh the 2 balls, then the overweight ball will be found.

Subject: Math Puzzles

- Related Questions

Which number multiplied by itself will give the output as 12345678987654321 ?

11 * 11 = 121

111 * 111 = 12321

what we observe is that the square of the number follows a pattern: 2 1's gives 121. 3 1's gives 12321.

so to get 12345678987654321 we need to get square of 9 1's(111,111,111).

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Subject: Math PuzzlesWhat 5 - digit number has the following features :

If we put the numeral 1 at the beginning, we get a number three times smaller than if we put the numeral 1 at the end of the number?

Let the 5 digit number be represented by abcde.

Then the 6 digit number, 1abcde x 3 = abcde1 (another 6 digit number)

Now let Y = abcde

Then (100000 + Y) x 3 = (Y x 10) + 1

300000 + 3Y = 10Y + 1

7Y = 299999

Y = 299999 ÷ 7 = 42857

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Subject: Math PuzzlesArrange four nines(9) and a one(1) and only one mathematical symbol to make it equal to 100 ?

199 - 99 = 100

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Subject: Math Puzzles

In a Certain Country of 5 = 3. If the same proportion holds, what is the value of of 10 ?

A) 4 | B) 6 |

C) 8 | D) 10 |

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Subject: Math PuzzlesReplace each letter for a unique digit so that the equation is correct

(1+9+6+8+3) x (1+9+6+8+3) x (1+9+6+8+3) = 19683

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Subject: Math Puzzles