Number System 1827÷ 36 x ?=162.4 2.6 3.2 1.9 4.3 2.6 3.2 1.9 4.3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3.2
Number System If (47)² is added to the square of a number the answer thus obtained is 2290. What is the number ? 8 9 10 7 8 9 10 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System Two numbers are in the ratio 3:5. If 9 be subtracted from each, they are in the ratio of 9:17. The first number is: 18 27 30 36 18 27 30 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (3x-9):(5x-9) = 9:17 x = 12 => 3x = 36
Number System What least number must be subtracted from 2641 so that the remainder left, when divided by 10,15 and 25, is 7 in each case ? 87 94 81 84 87 94 81 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP LCM of 10, 15, 25 = 150When we drive 2641 by 150 the remainder is 91.But the remainder should be 7.So, the number to be subtracted from 2641 is 91 - 7 = 84.
Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 101 99 103 97 101 99 103 97 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.
Number System Complete the series : 81, 69, 58, 48, 39 ........ 28 29 30 31 28 29 30 31 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 31
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