Number System Find the smallest number which should be multiplied with 520 to make it a perfect square. None of these 120 30 55 None of these 120 30 55 ANSWER DOWNLOAD EXAMIANS APP
Number System The average age of seven boys sitting in a row facing North is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the b 29 years 31 years 28 years 30 years 29 years 31 years 28 years 30 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Age of the fourth boy = (26 x 7 - 3 x 19 - 3 x 32) years = (182 - 57 - 96) years = 29 years
Number System 486+32×25—59=? 567 582 596 528 567 582 596 528 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 528
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: 6 5 10 4 6 5 10 4 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ? 15 years 18 years 25 years 21 years 15 years 18 years 25 years 21 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the father's age be x and son's age yTherefore, x + y = 60 ....................(i)Five years back, (x - 5) = 4 (y - 5)x - 4y = - 15 ......................(2)Solving (1) and (2), x = 45 and y = 15
Number System 84 * 29 + 365 = ? - 2071 2801 2436 - 2801 - 2071 2801 2436 - 2801 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP - 84 * (30 - 1) + 365= - (84 * 30) + 84 + 365= - 2520 + 449 = - 2071
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