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 60 30 120 240 60 30 120 240 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The least number of trees that are required = LCM(4, 5, 6) = 60.
Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: None of these 30 40 20 None of these 30 40 20 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ? 25.84 27.84 21.84 24.84 25.84 27.84 21.84 24.84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84
Number System Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is 8.584 8.484 8.784 8.684 8.584 8.484 8.784 8.684 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8.484
Number System 16.23 x 12.9 + 17.32 = ? 246.687 None of these 236.687 226.687 246.687 None of these 236.687 226.687 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687
Number System The difference between 78% of a number and 59% of the same number is 323. What is 62% of that number ? Rs. 945 Rs. 926 Rs. 1054 Rs. 986 Rs. 945 Rs. 926 Rs. 1054 Rs. 986 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.78% of x - 59% of x = 323= 78x - 59x/100 = 323= 19x/100 = 323∴ x = 323 x 100/19 = 1700= 62% of 1700 = 1700 x 62/100 = 1054
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