Number System In how many different ways can the letters of the word TEST' be arranged ? 12 8 16 10 12 8 16 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System Which one of the following numbers is exactly divisible by 11? 235641 315624 415624 245642 235641 315624 415624 245642 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 Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is 8.684 8.484 8.784 8.584 8.684 8.484 8.784 8.584 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8.484
Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 44 46 45 47 44 46 45 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
Number System How many numbers up to 100 are divisible by 7? 93 14 100 107 93 14 100 107 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 100/7 = 14 2/7 => 14 Numbers
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 275 225 245 295 275 225 245 295 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
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