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Question

If A is a digit and the decimal 3.0A9 can be rounded off to its nearest tenths as 3.1, then A can be ___

A
4
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B
3
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C
6
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D
2
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Solution

The correct option is C 6
To round a decimal at any place, look for the digit in the place on its right.

If the digit on the right is higher than 5, then the decimal is rounded up.

And if the digit on the right is less than 5, then the decimal is rounded down.

So, for 3.0A9 to be rounded up to 3.1, the digit A should be atleast as big as 5.

Hence, the value of A is 6.

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