Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 290/289 289/290 1/289 289 290/289 289/290 1/289 289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
Number System In a division sum, the quotient is 120, the divisor 456 and the remainder 333, find the dividend? 56053 5553 55053 50553 56053 5553 55053 50553 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 120 * 456 + 333 = 55053
Number System 2536+4851—?=3450+313 5243 3624 6784 4567 5243 3624 6784 4567 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3624
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 79 74 71 83 79 74 71 83 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
Number System Find the number of factors of 300 excluding 1 and itself. 14 18 15 16 14 18 15 16 ANSWER DOWNLOAD EXAMIANS APP
Number System If all the fractions 3/10, 1/16, 4/11, 2/9, 1/7, 5/14 and 5/24 arranged in descending order of their values, then which one will be the third? 2/9 1/16 4/11 3/10 2/9 1/16 4/11 3/10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/10 = 0.3, 1/16 = 0.0625, 4/11 = 0.36, 2/9 = 0.22, 1/7 = 0.14, 5/14 = 0.36 and 5/24 = 0.214/11 > 5/14 > 3/10 > 2/9 > 5/24 > 1/7 > 1/163/10 will be the third.
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