Instructions

What should come in place of the question mark (?) in the following questions? (NOTE : You are not expected to calculate the exact value)

Question 123

$$\sqrt[3]{7.938} \times (6.120)^{2}-4.9256=?$$

Solution

Expression : $$\sqrt[3]{7.938} \times (6.120)^{2}-4.9256=?$$

$$\approx \sqrt[3]{8} \times (6)^{2} - 5=?$$

= $$2 \times 36 - 5 = 72 - 5$$

= $$67 \approx 70$$

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