Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 124 146 163 179 124 146 163 179 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System 217 * 217 + 183 * 183 = ? 79698 80698 80578 81268 79698 80698 80578 81268 ANSWER DOWNLOAD EXAMIANS APP
Number System 68375 + 72848 - ? = 34346 + 49569 None of these 58308 57308 59308 None of these 58308 57308 59308 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 68375 + 72848 - 34346 - 49569 = 141223 - 83915 = 57308
Number System Complete the series : 1, 2, 3, 5, 8, 13 .... 1 7 4 9 1 7 4 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 290/289 1/289 289/290 289 290/289 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 A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits? 60 12 7 8 60 12 7 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12
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