Number System In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is 775 640 750 725 775 640 750 725 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Failed students are 32% which is 248.∴ Total = 24800/32 = 775
Number System If the three fourth of a number is subtracted from the number; the value so, obtained is 163. What is that number ? 678 652 689 692 678 652 689 692 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number x (1 - 3/4) = 163∴ Number = 163 x 4 = 652
Number System A gardener wants to plant trees in his garden in such a way that the number of trees in each row should be the same. If there are 4 rows or 5 rows or 6 rows, then no tree will be left. Find the least 120 240 30 60 120 240 30 60 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The least number of trees that are required = LCM(4, 5, 6) = 60.
Number System What is the sum of all the prime numbers from 20 to 40? 119 120 118 117 119 120 118 117 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System What is the average of the following set of numbers ? 173, 192, 198, 204, 211, 223, 227 234 204 222 210 234 204 222 210 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Avg = 173 + 192 + 198 + 204 + 211 + 223 + 227/7 = 1428/7 = 204
Number System The difference between 45% of a number and 18% of the same number is 145.8. What is 30% of that number ? 162 245 188 141 162 245 188 141 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.45% of x - 18% of x = 145.8∴ x/100 (45 - 18) = 145.8∴ x = 145.8 x 100/27 = 540∴ 30% of 540 = 540 x 30/100 = 162
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