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? 27 32 8 None of these 27 32 8 None of these 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 √360 - 225 x 2 + 379 = ? 18 17 20 19 18 17 20 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
Number System Sum of two consecutive even terms lacks by 98 from their product. Find the sum of these number 32 18 24 None 32 18 24 None ANSWER DOWNLOAD EXAMIANS APP
Number System Three numbers are in ratio of 3: 4 :5. If the sum of first & third numbers is more than second number by 52, which will be largest number? 34 78 65 23 34 78 65 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 65
Number System The peresent age of the father and the son are in the ratio of 8:3. After 12 years the ratio of their ages will be 2:1. What is the sum of the present age of the father and the son ? 66 years 68 years 69 years 67 years 66 years 68 years 69 years 67 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the present age of the father be 'x' and that of the son be 'y'. Then x/y = 8/3∴ 3x = 8y Further, x + 12/y + 12 = 2/1 ∴ x + 12 = 2y + 24 ∴ x - 2y = 12 ......(ii)From eqn (i) and (ii), x = 48, y = 18 ∴ sum = 66 yrs.
Number System 63.602 + 153.756 + 94.754 - 84.321 - 122.204 = ? 140.587 143.587 141.587 142.587 140.587 143.587 141.587 142.587 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 312.112 - 170.525 = 141.587
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