Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? None of these 6 3.5 8 None of these 6 3.5 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System If a number is subtracted from its square we get 272. Find the number? 14 22 17 24 14 22 17 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
Number System If the numerator of a fraction is decreased by 12.5% and the denominator is increased by 180% the resultant fraction is 1/2. What is the original fraction ? 1/5 7/5 3/5 8/5 1/5 7/5 3/5 8/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the original fraction be x/y.∴ x x 87.5/100/y x 280/100 = 1/2or 87.5x/280y = 1/2∴ 175x = 280y∴ x/y = 280/175 = 8/5
Number System Find the number of factors of 300 excluding 1 and itself. 14 16 15 18 14 16 15 18 ANSWER DOWNLOAD EXAMIANS APP
Number System ind the number, difference between number and its 3/5 is 50 120 124 123 125 120 124 123 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number = x,Then, x-(3/5)x = 50,=> (2/5)x = 50 => 2x = 50*5,=> x = 125
Number System The difference between a number and its three-fifth is 50. What is the number? 75 100 125 None of these 75 100 125 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
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