Number System 64% of 2650+40% 0f 320=? 1247 1578 1824 2096 1247 1578 1824 2096 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1824
Number System Sum of square of first number and cube of second number together is 568. Also square of the second number is 15 less than square of 8. What is the value of three-fifth of the first number ? 8 9 7 6 8 9 7 6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the first number be x and the second number be y.∴ y² = 82 - 15 = 64 - 15 = 49∴ y = 7∴ x² + 73 = 568= x² + 343 = 568= x² + 568 - 343 = 225∴ x = √225 = 15∴ 15 x 3/5 = 9
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1092 1082 1192 1200 1092 1082 1192 1200 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of a number and its reciprocal is one-eighth of 34. What is the product of the number and its square root? 32 None of these 8 27 32 None of these 8 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,x + 1/x = 34/8 8x2 - 34x + 8 = 0 4x2 - 17x + 4 = 0 (4x - 1)(x - 4) = 0 x = 4required number = 4 * √4 = 4 * 2 = 8.
Number System Find the greatest number which leaves the same remainder when it divides 25, 57 and 105. 8 16 12 18 8 16 12 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 105 - 57 = 4857 - 25 = 32105 - 25 = 80The H.C.F of 32, 48 and 80 is 16.
Number System Supply the missing figure : 3, 11, 8, 16, 13 .... 18 12 18 21 28 12 18 21 28 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
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