Number System 84 * 29 + 365 = ? 2801 2436 - 2071 - 2801 2801 2436 - 2071 - 2801 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP - 84 * (30 - 1) + 365= - (84 * 30) + 84 + 365= - 2520 + 449 = - 2071
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 77 76 75 78 77 76 75 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289/290 1/289 289 290/289 289/290 1/289 289 290/289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
Number System (4300731) - ? = 2535618 1865113 1675123 1775123 1765113 1865113 1675123 1775123 1765113 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 4300731 - x = 2535618Then, x = 4300731 - 2535618 = 1765113
Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 99 97 101 103 99 97 101 103 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.
Number System 4550 ÷ 25% of ? = 130 140 125 130 135 140 125 130 135 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4550 ÷ ? x 25/100 = 130= 4550 ÷ ?/4 = 130= 4550 x 4/? = 130= ? x 130 = 4550 x 4= ? = 4550 x 4/130 = 140
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