Number System The sum of two numbers is 165 and the difference between them is 9. What is the average of these two numbers ? 83.5 85.5 84.5 82.5 83.5 85.5 84.5 82.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 165x - y = 92x = 174 ∴ x = 87 and y = 78∴ x + y/2 = 165/2 = 82.5
Number System If the difference between a number and its 2/5 is 240, find the number. 440 480 360 400 440 480 360 400 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 56 48 52 36 56 48 52 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
Number System Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is 8.684 8.484 8.784 8.584 8.684 8.484 8.784 8.584 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8.484
Number System If 1.5 x= 0.04 y, then the value of (y-x) (y+x) is: 93/77 77/73 73/77 83/77 93/77 77/73 73/77 83/77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 73/77
Number System What should come in place of question mark (?) in the following number series ? 7, 176, 480, 1058, 2188, 4426, ? 8884 8888 8882 8881 8884 8888 8882 8881 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Series is (No. + 9²) x 2, (+8²) x 2, (+7²) x 2, (+6²) x 2.......
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