Number System If the sum of the two numbers is 22 and the sum of their squares is 404, then the product of the numbers is: 40 44 80 88 40 44 80 88 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, (x + y) = 22 and x2 + y2 = 404 Now, 2xy = (x + y)2 - (x2 + y2) 2xy= 222 - 404 = 484 - 404 = 80xy = 40
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 45 36 48 360 45 36 48 360 ANSWER DOWNLOAD EXAMIANS APP
Number System A number exceeds by 25 from its 3/8 part. Then the number is? 39 40 35 32 39 40 35 32 ANSWER DOWNLOAD EXAMIANS APP
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1192 1092 1082 1200 1192 1092 1082 1200 ANSWER DOWNLOAD EXAMIANS APP
Number System If 1.5 x= 0.04 y, then the value of (y-x) (y+x) is: 93/77 83/77 77/73 73/77 93/77 83/77 77/73 73/77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 73/77
Number System The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ? 27.84 25.84 24.84 21.84 27.84 25.84 24.84 21.84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84
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