Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: 40 20 30 None of these 40 20 30 None of these ANSWER DOWNLOAD EXAMIANS APP
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 3 7 5 11 3 7 5 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 25xy = 144(x- y)2 = (x + y)2 – 4xy(x- y)2 = 625 – 576 => (x – y) = 7
Number System The sum of two numbers is 22. Five times one number is equal to 6 times the other. The bigger of the two numbers is: 12 10 16 15 12 10 16 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and (22 - x). Then,5x = 6(22 - x) 11x = 132 => x = 12So, the numbers are 12 and 10.
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: 44 40 80 88 44 40 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 Look at this series: 1000, 200, 40, ... What number should come next? 2 24 8 14 2 24 8 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP This is a simple division series. Each number is divided by 5. Rule = (1st number / 5 = 2nd number) (2nd number / 5 = 3rd number)....Now, (1000 / 5 = 200), (200 / 5 = 40), (40 / 5 = 8)...So answer is a = 8.
Number System √2304 x √? = 2832 3681 3481 3581 3381 3681 3481 3581 3381 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √2304 x √? = 2832= 48 x √? = 2832= √? = 2832/48 = 59∴? = 59 x 59 = 3481
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