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Question

If we expand 99, how many rods and blocks will we get?

A
9 rods, 9 blocks
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B
11 rods, 9 blocks
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C
90 rods, 9 blocks
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D
8 rods, 9 blocks
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Solution

The correct option is A 9 rods, 9 blocks
We know that each rod consists of 10 blocks. Let's expand 99 first:

99=90+9

This means that there are 9 rods and 9 blocks.

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