Number System Find the smallest number which should be multiplied with 520 to make it a perfect square. 30 120 None of these 55 30 120 None of these 55 ANSWER DOWNLOAD EXAMIANS APP
Number System {(742)² ÷ 36} ÷ 2 = ? 422.5 423.5 420.5 421.5 422.5 423.5 420.5 421.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 290/289 289/290 289 1/289 290/289 289/290 289 1/289 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 In a division sum, the divisor is 10 times the quotient and 5 times the remainder. If the remainder is 46, the dividend is: 6890 9865 5336 2568 6890 9865 5336 2568 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5336
Number System What is the sum of all the prime numbers from 20 to 40? 120 117 119 118 120 117 119 118 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System The difference between two integers is 5. Their product is 500. Find the numbers. 15, 20 21, 26 30, 25 20, 25 15, 20 21, 26 30, 25 20, 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the integers be x and (x + 5). Then, x(x + 5) = 500 x2 + 5x - 500 = 0 (x + 25)(x - 20) = 0 x = 20So, the numbers are 20 and 25.
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