Number System What is the value of 8/11 of 5/7 of 96% of 28875 ? 14400 15400 12900 13800 14400 15400 12900 13800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number = 8 x 5 x 96 x 28875/11 x 7 x 100 = 14400
Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2367 2410 2520 2678 2367 2410 2520 2678 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System Four-fifth of a number is 10 more than two-third of the same number. What is the number? 75 91 89 35 75 91 89 35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ? 660 840 780 720 660 840 780 720 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660
Number System In a pair of fractions, fraction A is twice the fraction B and the product of two fractions is 2/25. What is the value of fraction A? 2/5 1/5 1/25 Data inadequate 2/5 1/5 1/25 Data inadequate ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A = 2B => B = 1/2 A, so, AB = 2/25 1/2 A2 = 2/25A2 = 4/25 A = 2/5
Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 47 44 45 46 47 44 45 46 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
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