FUNDAMENTALS OF COMPUTER

BASIC COMPUTER CONCEPTS

HISTORY OF COMPUTERS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In ____ Man discovered a number system having ten digits using the ten fingers
 A Barter B Pebble C Basic counting D Analytical engine
Explanation:

Detailed explanation-1: -We use base 10 because we have 10 fingers. In base 10, ten digits are used and those digits are 0 through 9. The Mayans used a vigesimal (base 20) number system, the Babylonians used a sexagesimal (base 60) number system, and the Egyptians used a duo-decimal (base 12) number system.

Detailed explanation-2: -’4’ is a single raised middle finger. Then ‘5=4+1’ is middle finger and pinky, and so on. Just 10 digits actually allows you to count all the way to 1023, but we’ll ignore the thumbs and just use 8 fingers, to count up to 255=128+64+32+16 (left hand palm-up, pinky is 16) +8+4+2+1 (right hand palm-down, pinky is 1).

Detailed explanation-3: -Several civilisations developed positional notation independently, including the Babylonians, the Chinese and the Aztecs. By the 7th Century, Indian mathematicians had perfected a decimal (or base ten) positional system, which could represent any number with only ten unique symbols.

Detailed explanation-4: -decimal system, also called Hindu-Arabic number system or Arabic number system, in mathematics, positional numeral system employing 10 as the base and requiring 10 different numerals, the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. It also requires a dot (decimal point) to represent decimal fractions.

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