Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 10 4 5 6 10 4 5 6 ANSWER DOWNLOAD EXAMIANS APP
Number System If one-seventh of a number is 55 then 40% of that number = ? 154 171 147 163 154 171 147 163 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x , Therefore, x/7 = 55Therefore, x = 55 x 7 = 385Therefore, 49% of 385 = 154
Number System If the fraction 8/6, 7/5, 18/13, 9/5 and 7/11 are arranged in descending order of their values, which one will be the second ? 1/9 7/5 2/7 3/4 1/9 7/5 2/7 3/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8/6 = 1. 333, 7/5 = 1.4, 18/13 = 1.3849/5 = 1.8 and 7/11 = 0.636Therefore, Descending order is 9/5 > 7/5 > 18/13 > 8/6 > 7/11Therefore Second fraction is 7/5
Number System On converting the following base-2 numeral in base ten, 1101101, we get 106 109 107 108 106 109 107 108 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 109
Number System If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ? 12/25 13/25 6/7 3/5 12/25 13/25 6/7 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
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 ? 68 years 69 years 67 years 66 years 68 years 69 years 67 years 66 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.
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