Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 78 77 76 75 78 77 76 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System In how many different ways can the letters of the word "MOBILIZE" be arranged ? 17453 18456 19765 20160 17453 18456 19765 20160 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word MOBILIZE has eight letters in which I comes twice ∴ Number of arrangements = 8!/2! = 20160
Number System The sum of the digits of a two digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then what will be the original number? 49 39 59 69 49 39 59 69 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 7.5 15 4 5 7.5 15 4 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System What is the sum of all the composite numbers up to 20? 132 130 131 128 132 130 131 128 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System What value should come in place of ? in the given number series ? 15, 51, 162, 498, 1509, ? 4545 5656 7878 3434 4545 5656 7878 3434 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 15, (15 + 2) x 3 = 51,(51 + 3) x 3 = 162, (162 + 4) x 3 = 498, (498 + 5) x 3 = 1509(1509 + 6) x 3 = 4545
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