Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 4/5 3/5 3/10 5/4 4/5 3/5 3/10 5/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System The difference between the two digit number and the number obtained by interchanging its digits is 54. The difference between the digits is? 1 Nothing can be said. 4 6 1 Nothing can be said. 4 6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) – (10y + x) = 54x – y = 6
Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 170 171 169 168 170 171 169 168 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
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 30 240 60 120 30 240 60 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The least number of trees that are required = LCM(4, 5, 6) = 60.
Number System Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is 8.684 8.784 8.584 8.484 8.684 8.784 8.584 8.484 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8.484
Number System [(18.6 x 4.5) + (7.8 ÷ 0.24)] ÷ 3.2 = ? 26.3125 46.3125 36.3125 25.3125 26.3125 46.3125 36.3125 25.3125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 83.7 + 32.5/3.2 = 116.2/3.2 = 36.3125
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