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: 80 88 44 40 80 88 44 40 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 The sum of the ages of a son and father is 65 years. After 5 years the age of father will be double of the age of son. What is the age of son ? 17 years 18 years 20 years 19 years 17 years 18 years 20 years 19 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the age of the son be x and the age of the father be y.Therefore, x + y = 65 ..........(i)or, 2 x (x + 5) = (y + 5)or, 2x + 10 = y + 5or, 2x - y = 5 ...................(ii)From equations (i) and (ii), x = 20, y = 45
Number System Find the smallest number which should be multiplied with 520 to make it a perfect square. None of these 120 55 30 None of these 120 55 30 ANSWER DOWNLOAD EXAMIANS APP
Number System Supply the missing figure : 3, 11, 8, 16, 13 .... 18 28 18 21 12 28 18 21 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
Number System When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 650 850 750 550 650 850 750 550 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
Number System How many numbers up to 100 and 300 are divisible by 11? 18 20 21 22 18 20 21 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (300 – 100)/11 = 200/11 = 18 2/1118 Numbers
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