Number System The difference between 35% of a number and 18% of the same number is 93.5 then what is the 40% of that number ? 220 225 232 245 220 225 232 245 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Diff = (35 - 18)% of x = 93.517x/100 = 93.5Therefore, x = 550Therefore, 40% of 550 = 220
Number System The square root of 0.0081 is: 0.009 0.09 0.9 0.91 0.009 0.09 0.9 0.91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.09
Number System The sum of three consecutive numbers is 87. The greatest among these three number is: 30 26 29 28 30 26 29 28 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x, x + 1 and x + 2 Then,x + (x + 1) + (x + 2) = 873x = 84x = 28Greatest number, (x + 2) = 30.
Number System The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ? 21.84 24.84 25.84 27.84 21.84 24.84 25.84 27.84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84
Number System What is the sum of all the prime numbers from 20 to 40? 119 118 117 120 119 118 117 120 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 18 42 24 81 18 42 24 81 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
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