Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 625 824 920 712 625 824 920 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 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 What is the sum of all the prime numbers from 20 to 40? 119 117 118 120 119 117 118 120 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System If the L.C.M of two numbers is 750 and their product is 18750, find the H.C.F of the numbers. 125 25 50 30 125 25 50 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.
Number System What should come in place of the question mark (?) in the given number series ? 888, 888, 444, 148, ?, 7.4 38 37 36 39 38 37 36 39 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let x be the missing number.Then888/888 = 1,888/444 = 2,444/148 = 3,148/x = 4= x = 148/4 = 37 and 37/7.4 = 5
Number System {(742)² ÷ 36} ÷ 2 = ? 421.5 423.5 420.5 422.5 421.5 423.5 420.5 422.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
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