Number System Which one of the following numbers is exactly divisible by 11? 245642 235641 415624 315624 245642 235641 415624 315624 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (4 + 5 + 2) - (1 + 6 + 3) = 1, not divisible by 11.(2 + 6 + 4) - (4 + 5 + 2) = 1, not divisible by 11.(4 + 6 + 1) - (2 + 5 + 3) = 1, not divisible by 11.(4 + 6 + 1) - (2 + 5 + 4) = 0. So, 415624 is divisible by 11.
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: 42 24 18 81 42 24 18 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.
Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 44 47 46 45 44 47 46 45 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
Number System 432+2170+35=? 523 729 678 494 523 729 678 494 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 494
Number System Supply the missing figure : 2, 6, 12, 20, 30 ... 56 41 42 39 40 41 42 39 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
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