Instructions

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

Question 52

52.02% of 749 + 45% of 419.98 -? = $$15^{2}$$

Solution

Expression : 52.02% of 749 + 45% of 419.98 -? = $$15^{2}$$

= $$(\frac{52}{100} \times 750) + (\frac{45}{100} \times 420) - ? = 225$$

= $$390 + 189 - ? = 225$$

= $$? = 579 - 225 = 354$$

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