Quicker Maths
10Dec/091

Third Dimension of Box

I have a box. The two dimensions of the box are 4” and 3”. Compute the third dimension of the box so that the space diagonal of the box is and integer.

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9Dec/090

Abra Cadabra

SEVEN VIGINTILLION, THREE HUNDRED FORTY SIX NOVEMDECILLION, SIX HUNDRED FORTY EIGHT OCTODECILLION, FOUR SEPTEDECILLION, FIVE HUNDRED SIXTY SEXDECILLION, NINE HUNDRED EIGHTYSIX QUINDECILLION, TWO HUNDRED FIFTEEN QUATTOUR DECILLION, THREE HUNDRED FORTY EIGHT DUODECILLION, FOUR HUNDRED FORTY FOUR UNDECILLION. TWO HUNDRED EIGHTYSIX DECILLION, FOUR HUNDRED FORTY FIVE NONILLION, THREE HUNDRED AND FIVE OCTILLION, ONE HUNDRED FORTY SIX SEPTILLION, THIRTY NINE SEXTILLION, ONE HUNDRED FORTY QUINTILLION, FORTY SIX QUADRILLION, NINE HUNDRED SIXTY TRILLION, SIX HUNDRED SEVENTY EIGHT BILLION, FIVE HUNDRED EIGHTYTWO MILLION, TWO HUNDRED FIFTY SIX THOUSAND AND THREE. Can you write this as a numeral?

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8Dec/094

Matching Pair of Socks

Mammu has 16 pairs of white socks and 16 pairs of brown socks. She keeps them all in the same drawer. If she picks out three socks at random what is the probability she will get a matching pair?

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7Dec/094

A Boat Race

The Yacht club recently held a boat race. The captain had some difficulty deciding the order of rowing in the boat for his crew.

3 of his crew were strokeside oarsmen only and 2 of them were bow side oarsmen only. Weights and personal preferences were not important really.

In how many ways the captain could have arranged his eight men to form the crew?

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27Nov/093

The Problem of the Music concert

Recently I was at a music concert in Calcutta. I was sitting only one hundred feet away from the musicians.

The performance was being broadcasted. My sister Vasantha who lives in Bangalore also heard the same concert on the radio. I am sure you know that Bangalore is over a thousand miles away from Calcutta, and also that sound travels at 1100 feet per second.

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