Number System (√6 + 1)² = ? + 2√6 8 6 5 7 8 6 5 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (√6 + 1)² - 2√6= (√6)² + 2 x √6 + 1 + 1² - 2√6= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7
Number System The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number 636 673 845 724 636 673 845 724 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100 = 636
Number System (444 x 44 x 4) ÷ 40 ? 2053.6 2153.6 1853.6 1953.6 2053.6 2153.6 1853.6 1953.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 444 x 44 x 4/40 = 1953.6
Number System Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is 74 93 85 110 74 93 85 110 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 85
Number System If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ? 660 720 780 840 660 720 780 840 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660
Number System √9216 + √15376 = ? 231 224 220 227 231 224 220 227 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √9216 + √15376= 96 + 124= 220
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