Question

Which of 132^2, 87^2, 72^2 and 209^2 would end with digit 1?

209^2

72^2

132^2

87^2

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Answer 1

answer

209square is the answer

Answer 2

$209^2$ will end with digit 1.

Step-by-step explanation:

To find the last digit in the final result, we just need to find the number that is present in the one's place of the number to be squared. Then find the square of the one's place, you will get the value of the end digit.

Let us look at the options given:

1. $209^2$

• 9 is present at one's place, thus, squaring 9, we obtain 81. Hence, the final result will have 1 at the end.

2. $72^2$

• 2 is present at one's place, thus, squaring 2, we obtain 4. Hence, the final result will have 4 at the end.

3. $132^2$

• Again 2 is present at one's place, thus, squaring 2, we obtain 4. Hence, the final result will have 4 at the end.

4. $87^2$

• 7 is present at one's place, thus, squaring 7, we obtain 49. Hence, the final result will have 9 at the end.