Instructions

What approximate value will come in place of the question mark (?) in the following questions.? (You are not required to calculate the exact value).

Question 81

$$\frac{2430}{16}-16.97+\sqrt{(?)}=164$$

Solution

Expression : $$\frac{2430}{16}-16.97+\sqrt{(?)}=164$$

=> $$\frac{2432}{16} - 17 + \sqrt{x} = 164$$

=> $$152 - 17 + \sqrt{x} = 164$$

=> $$\sqrt{x} = 164 - 135 = 29$$

=> $$x = 29^2 = 841$$

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