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 None of these 40 30 20 None of these 40 30 ANSWER DOWNLOAD EXAMIANS APP
Number System What is the value of ? in the following equations ? 72/? = ?/50 100 80 60 40 100 80 60 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
Number System Four-fifth of a number is 10 more than two-third of the same number. What is the number? 75 35 89 91 75 35 89 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System If 4 2/3 is subtracted form 10 1/2 and the difference is multiplied by 450, then what is the final answer? 2675 2875 2725 None of these 2675 2875 2725 None of these ANSWER DOWNLOAD EXAMIANS APP
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 74 79 83 71 74 79 83 71 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. 18 16 14 15 18 16 14 15 ANSWER DOWNLOAD EXAMIANS APP
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