Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 42 16 23 36 42 16 23 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System The difference between a two-digit number and the number obtained by interchanging its two digits is 45. The sum of the digit of the number is 9. What is the product of the two digits of the number? 15 14 13 12 15 14 13 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.Therefore, x + y = 9 ..................(i)10x + y - (10y + x) = 4510x + y - 10y - x = 45Therefore, x - y = 5 ..................(ii)From (i) and (ii), x = 7, y = 2Number = 72Therefore, = x x y = 7 x 2 = 14
Number System The number of prime factors of (6)10×(7)17×(55)27 101 91 41 61 101 91 41 61 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
Number System ?125÷5x ?=6265 1452 124 1253 153 1452 124 1253 153 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1253
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 920 625 824 712 920 625 824 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
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.
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