Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 7 5 11 3 7 5 11 3 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 a number and its reciprocal is one-eighth of 34. What is the product of the number and its square root? None of these 27 32 8 None of these 27 32 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,x + 1/x = 34/8 8x2 - 34x + 8 = 0 4x2 - 17x + 4 = 0 (4x - 1)(x - 4) = 0 x = 4required number = 4 * √4 = 4 * 2 = 8.
Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 240 160 180 140 240 160 180 140 ANSWER DOWNLOAD EXAMIANS APP
Number System What is 432 times 119 ? 50408 53408 51408 52408 50408 53408 51408 52408 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. 432 x 119 = 51408
Number System The Twenty-First Century will start on January 1 in the year 2101 2000 2100 2001 2101 2000 2100 2001 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2001
Number System In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is 775 750 640 725 775 750 640 725 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Failed students are 32% which is 248.∴ Total = 24800/32 = 775
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