Question

Choose the correct answer that shows the base 10 number 23 in binary form.

Answer 1

there are algorithms online, but 23 is between two powers of 2 ,

2^5 < 23 <= 2^4

Answer 2

i dont get it @perl

Answer 3

a binary number is basically powers of 2

a1 *2^n + a2*2^n-2 + ... an , where an is either 0 or 1

Answer 4

10=1010
10+10=1010+1010=10100
10+10+3=10111

Answer 5

http://www.mathsisfun.com/binary-digits.html

Answer 6

2 | 23
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2 | 11 R: 1
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2 | 5 R: 1
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2 | 2 R: 1
------
2 | 1 R: 0
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1 R: 1

R is remainder at each stage of division. Write the remainders in a sequence from the last remainder to the first one: 10111

Answer 7

oh thats nice method i forgot

Answer 8

repeated division , and noting the remainders

Answer 9

upside down division is a nice touch