Number System The product of two consecutive odd numbers is 6723. Find is the greater number. 80 85 77 83 80 85 77 83 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the first odd number be x.Then, the other odd number would be x + 2.∴ x(x+2) = 6723= x2 + 2x = 6723= x2 + 2x = 6723= x2 + 2x - 6723 = 0= x2 + 83 - 81 x - 6723 = 0= x(x+83) - 81 (x + 83) = 0= (x + 83) (x - 81) = 0= (x + 83) (x - 81) = 0= x - 81 = 0∴ x = 81Hence, greater number = x + 2 = 81 + 2 = 83
Number System If the following fractions 7/6, 6/7, 5/3, 8/13 and 6/5 are arranged in descending order, which will be the last in the series? 8/13 6/13 9/13 7/13 8/13 6/13 9/13 7/13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7/6 = 1.166, 6/7 = 0.857,5/3 = 1.66,8/13 = 0.615,6/5 = 1.2Therefore, 5/3 > 6/5 > 7/6 > 6/7 > 8/13
Number System On dividing number by 357, we get 39 as remainder. On dividing the same number by 17, what will be the remainder? 3 5 11 0 3 5 11 0 ANSWER DOWNLOAD EXAMIANS APP
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 5 10 6 4 5 10 6 4 ANSWER DOWNLOAD EXAMIANS APP
Number System Which one of the following represents the sum of the first n even numbers? N(N + 1) N2+ 1 N(N – 1) N2 N(N + 1) N2+ 1 N(N – 1) N2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System The sum of 8 consecutive odd numbers is 656. Also average of four consecutive even numbers is 87. What is the sum of the smallest odd number and second largest even number ? 163 167 160 158 163 167 160 158 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Average of 8 consecutive odd numbers = 656/8 = 82∴ Fourth number = 82 - 1 = 81∴ First numbers = 75Average of 4 even numbers = 87∴ Second even number = 87 - 1 = 86Second largest even number = 88∴ Required sum = 75 + 88 = 163
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