The correct option is C 1521 The square of 9 is 81 which has a unit digit of 1. 392 should have 1 in the units place. Only 1521 satisfies this. Alternatively, ...

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Byju's Answer

Standard VIII

Mathematics

Finding Square of a Number with Unit's Place 5

The square of...

Question

The square of 39 is ___ .

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1500

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1521

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1530

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Solution

The correct option is C
1521

The square of 9 is 81 which has a unit digit of 1. 39² should have 1 in the units place. Only 1521 satisfies this.
Alternatively, 39 can be multiplied by itself to give the result.

Suggest Corrections

The square of 39 is ___ .

The correct option is C 1521 The square of 9 is 81 which has a unit digit of 1. 392 should have 1 in the units place. Only 1521 satisfies this. Alternatively, 39 can be multiplied by itself to give the result.

The correct option is C
1521

The square of 9 is 81 which has a unit digit of 1. 39² should have 1 in the units place. Only 1521 satisfies this.
Alternatively, 39 can be multiplied by itself to give the result.