Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: 20 40 None of these 30 20 40 None of these 30 ANSWER DOWNLOAD EXAMIANS APP
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1965 1945 1975 1955 1965 1945 1975 1955 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because (x + y)² = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945
Number System On dividing number by 357, we get 39 as remainder. On dividing the same number by 17, what will be the remainder? 5 3 11 0 5 3 11 0 ANSWER DOWNLOAD EXAMIANS APP
Number System Find the greatest number which leaves the same remainder when it divides 25, 57 and 105. 8 16 12 18 8 16 12 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 105 - 57 = 4857 - 25 = 32105 - 25 = 80The H.C.F of 32, 48 and 80 is 16.
Number System A, B, C, D and E are consecutive even numbers respectively. The average of 5 numbers is 82. What is the product of C and E ? 6373 6383 6363 6353 6373 6383 6363 6353 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + x + 1 + x + 2 + x + 3 + x + 4 = 5 x 82= 5x + 10 = 410 = 5x = 400= x = 400/5 = 80 ∴ A = 80C = 82and E = 84= C x E = 82 x 84 = 6383
Number System (444 x 44 x 4) ÷ 40 ? 1953.6 1853.6 2153.6 2053.6 1953.6 1853.6 2153.6 2053.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 444 x 44 x 4/40 = 1953.6
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