Instructions

What should come in place of question mark (?) in the following questions ?

Question 43

$$\sqrt{3969}+\sqrt{7921}$$

Solution
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Expression : $$\sqrt{3969}+\sqrt{7921}$$

= $$\sqrt{49 \times 81} + \sqrt{7921}$$

= $$(7 \times 9) + 89$$

= $$63 + 89 = 152$$

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