Number System 7589 - ? = 3434 1123 4155 11023 4242 1123 4155 11023 4242 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 7589 - x = 3434Then x = 7589 - 3434 = 4155
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 824 625 920 712 824 625 920 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 Sum of the digits number is 8 and their product is 12. Find the difference between the digits? None 4 6 2 None 4 6 2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 180 12 160 28 180 12 160 28 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System (4 86%of 6500) ÷ 36 =? 877.5 777.5 977.5 677.5 877.5 777.5 977.5 677.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 877.5
Number System A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15? 1 11 13 9 1 11 13 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 45 + 31 = 76/15 = 1 (Remainder)
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