Number System If the difference between a number and its 2/5 is 240, find the number. 400 480 360 440 400 480 360 440 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
Number System The number of prime factors of (6)10×(7)17×(55)27 41 91 61 101 41 91 61 101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 48 45 360 36 48 45 360 36 ANSWER DOWNLOAD EXAMIANS APP
Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 103 97 99 101 103 97 99 101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 124 112 120 116 124 112 120 116 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a + b = 16 Therefore, (a+b)² = (16)² = 256 a² + b² + 2ab = 256Therefore, a² + b² = 256 - 2 x 68Therefore, a² + b² = 256 - 136 = 120
Number System 2536+4851—?=3450+313 4567 6784 5243 3624 4567 6784 5243 3624 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3624
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