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Question

Using the digits 3, 5 and 7 (without any repitition), how many distinct numbers can be formed?

A
7
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B
5
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C
4
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D
6
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Solution

The correct option is D 6
Given digits are 3, 5 and 7.

Distinct numbers can be formed by shifting the digits as shown below.
Number formed Hundreds place Tens place Units place
753 7 5 3
735 7 3 5
573 5 7 3
537 5 3 7
375 3 7 5
357 3 5 7

So, a total of 6 distinct numbers can be formed using these digits.

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