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Estimation of Difference and Quotient

The One's Dig...

Question

The One's Digit in the Square of $77$ is:

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Solution

The square of ' $77$ ‘ is ’ $5929$ ‘. The One’s digit in ’ $5929$ ‘ is ’ $9$ '.
Therefore, one’s digit in the square of ' $77$ ‘ is ’ $9$ '

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Estimation of Difference and Quotient

Standard VI Mathematics

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