Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289/290 1/289 289 290/289 289/290 1/289 289 290/289 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 What is the sum of 1 + 2 + 3+ ... + 27 ? 396 382 343 378 396 382 343 378 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 6.4 x 8.5 x 25/3.2 x 12.5 = ? 5.6 2.3 3.4 4.5 5.6 2.3 3.4 4.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
Number System If one-third of one fourth of a number is 15, then three-tenth of that number is: 35 45 25 54 35 45 25 54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,1/3 of 1/4 of x = 15x = 15 * 12 = 180So, required number = (3/10 * 180) = 54.
Number System Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers? 12, 7 12, 9 11, 6 10, 5 12, 7 12, 9 11, 6 10, 5 ANSWER DOWNLOAD EXAMIANS APP
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 16 36 23 42 16 36 23 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
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