Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? 3.5 6 None of these 8 3.5 6 None of these 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? 24 14 22 17 24 14 22 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
Number System What is the sum of all the composite numbers up to 20? 130 131 132 128 130 131 132 128 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is 72 56 44 38 72 56 44 38 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 72
Number System (12)² - (4.4)² - (0.04)² = ? 131.6384 129.6384 125.6384 124.6384 131.6384 129.6384 125.6384 124.6384 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384
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