Number System What will be the next number in the following number series ? 177 162 182 191 177 162 182 191 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1² + 1, 3² + 3, 5² + 5, 7² + 7
Number System In a division sum, the quotient is 120, the divisor 456 and the remainder 333, find the dividend? 50553 5553 55053 56053 50553 5553 55053 56053 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 120 * 456 + 333 = 55053
Number System What is the average of the following set of numbers ? 173, 192, 198, 204, 211, 223, 227 222 210 234 204 222 210 234 204 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Avg = 173 + 192 + 198 + 204 + 211 + 223 + 227/7 = 1428/7 = 204
Number System 124, 235, 447, 760, 1174, ? 1589 1389 1489 1689 1589 1389 1489 1689 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP +111, +212, +313, +414
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 290/289 1/289 289 289/290 290/289 1/289 289 289/290 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 A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 18 24 81 42 18 24 81 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
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