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).
Solution
Expression : $$15.99\times9.89-\sqrt{624.89}-17.001\times1.99=?^{2}$$
=> $$(x)^2 = (16 \times 10) - (\sqrt{625}) - (17\times 2)$$
=> $$(x)^2 = 160 - 25 - 34 = 101$$
=> $$x \approx \sqrt{100} = 10$$
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