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 80

$$16.02^{2} + 144 + 23.96 + ? = 783.867$$

Solution

Expression : $$16.02^{2} + 144 + 23.96 + ? = 783.867$$

=> $$16^2 + 144 + 24 + x = 784$$

=> $$256 + 168 + x = 784$$

=> $$x = 784 - 424 = 360$$

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