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Predicting Last Digit of an Exponent

How many 3-di...

Question

How many 3-digit numbers can be formed using the digits 6, 0, 4 when repetition of digits is allowed.

A

12

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B

8

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C

15

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D

18

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Solution

The correct option is D 18
The possible 3 digit numbers using the digits 6, 0, 4 when repetition of digits is allowed are 400, 406, 460, 466, 444, 404, 440, 446, 464, 600, 604, 640, 644, 646, 664, 606, 660 and 666.

Hence they are 18 in total.

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Predicting Last Digit of an Exponent

Standard VII Mathematics

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