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Question

What will be the sum of the smallest number and the largest numbers that can be formed using the digits 7, 5, 2, 3 without repeating?

A
2537.
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B
9889
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C
9572.
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D
7235.
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Solution

The correct option is B 9889
2 is the smallest number among 7, 5, 2, 3
3 being the second smallest followed by 5 and 7 at last.

We should always start from the left hand side.

So, the smallest number using the combination of digits is 7, 5, 2, 3 is 2357.

Then reversing the number will give the largest number
= 7532

Sum = 2357 + 7532

= 9889

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