Number System 124, 235, 447, 760, 1174, ? 1589 1689 1389 1489 1589 1689 1389 1489 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP +111, +212, +313, +414
Number System On multiplying a number by 7, the product is a number each of whose digits is 3. The smallest such number is: 47649 47719 47619 48619 47649 47719 47619 48619 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP By hit and trail, we find that47619 * 7 = 333333.7) 333333 (47619 333333---------------- 0
Number System Which number should replace question mark (?) in the following equation ? ?/342 = 38/? 118 112 114 116 118 112 114 116 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 342 x 38Therefore, ? = √342 x 38 = √38 x 9 x 38 = 38 x 3 = 114
Number System In how many different ways can the letters of word "SENTENCE" be arranged ? 6460 3360 2360 3260 6460 3360 2360 3260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 8!/3! 2! = 40320/12 = 3360
Number System What is the least number that should be added to 5200 to make it a perfect square ? 288 129 225 275 288 129 225 275 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.
Number System The average of five consecutive even numbers A, B, C, D and E is 42. What is the product of B and D ? 2476 1760 4589 3289 2476 1760 4589 3289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E/5 = 42∴ C = 42, ∴ B = 40, ∴ D = 44∴ B x D = 40 x 44 = 1760
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