Question 2

Calculate the value of $$\frac{61681\times61681-31681\times31681}{30000}$$

Solution

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Expression = $$\frac{61681\times61681-31681\times31681}{30000}$$

= $$\frac{(61681)^2-(31681)^2}{30000}$$

Using, $$a^2-b^2=(a-b)(a+b)$$

= $$\frac{(61681-31681)\times(61681+31681)}{30000}$$

= $$\frac{30000\times93362}{10200}=93362$$

=> Ans - (C)

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