Number System Two third of three- fifth of one fourth of a number is 24, what is 30% of that number? 90 72 42 69 90 72 42 69 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 2/3 * 3/5 * 1/4 = 24x = 240240 * 30/100 = 72
Number System What is the least number that should be added to 5200 to make it a perfect square ? 288 129 275 225 288 129 275 225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 35 55 45 65 35 55 45 65 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
Number System If 35% of a number is 899.5, what is 68% of that number ? 1747.6 2247.6 1847.6 1547.6 1747.6 2247.6 1847.6 1547.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Suppose the number is x.Then 35% of x = 899.5∴ 68% of x = 68/35 x 899.5 = 1747.6
Number System (12.04 x 7.5 + 0.8 x 45) ÷ 3 = ? 54.7 42.1 45 42.6 54.7 42.1 45 42.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (90.3 + 36) ÷ 3 = 126.3/3 = 42.1
Number System The difference between a number and its three-fifth is 50. What is the number? 100 None of these 75 125 100 None of these 75 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
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