Number System If the sum of four consecutive numbers is 370, which the following is the third lowest number among them 91 92 89 90 91 92 89 90 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four consecutive numbers be x, (x + 1), (x + 2), (x + 3) thenx + (x + 1) + (x + 2) + (x + 3) = 370= 4x + 6 = 370∴ x = 364/4 = 91∴ third lowest number among them = x + 1= 91 + 1 = 92
Number System What is the least number that should be added to 5200 to make it a perfect square ? 288 225 275 129 288 225 275 129 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.
Number System What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345? 2345 5243 2435 2105 2345 5243 2435 2105 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2000 + 300 + 40 + 5 = 2345
Number System If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is: 15 30 18 20 15 30 18 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 1/289 290/289 289/290 289 1/289 290/289 289/290 289 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 6.4 x 8.5 x 25/3.2 x 12.5 = ? 3.4 5.6 2.3 4.5 3.4 5.6 2.3 4.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
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