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A number when divided by 5 gives a remainder of 3. What will be the remainder when the same number is divided by 10?

1. 3
2. 8
3. 6
4. 5

Correct answer: 8

Solution

If a number leaves remainder 3 when divided by 5, it can be written as 5k + 3. For the same number to leave remainder 8 when divided by 10, it must be of the form 10m + 8, which also gives remainder 3 on division by 5.

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