Ms. Spanner is thinking of a number. Her number has 7 ones, 5 tens, and the place value of the digit at its hundreds place is 10 times the place value of the digit at its tens place. What is her number?

597

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557

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577

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567

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Solution

The correct option is B 557
To find the number, we will start from the ones place.
The number has 7 ones. So, the place value of the digit at ones place will be $1 \times 7 = 7$ .
The number has 5 tens. So, the place value of the digit at tens place will be $5 \times 10 = 50$ .
The place value of the digit at hundreds place is 10 times the place value of the digit at tens place.
The place value of the digit at tens place is 50. So the place value of the digit at hundreds place will be 500.
The number will be 500 + 50 + 7 = 557.
Thus, the number is 557.

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