if a mobile has 5 digits password then how many different password s can be set so that it must be divisible by 4
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The first digit can be from 1 to 9.
2nd , 3rd digits can be any from 0 to 9.
4th and fifth digits must be one of 04, 08, 12, 16, 20, ...96, 00.
=> 25 possibilities.
Total combinations and permutations: 9 * 10 * 10 * 25
= 22,500.
2nd , 3rd digits can be any from 0 to 9.
4th and fifth digits must be one of 04, 08, 12, 16, 20, ...96, 00.
=> 25 possibilities.
Total combinations and permutations: 9 * 10 * 10 * 25
= 22,500.
kvnmurty:
:-)
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