Number System The difference between 45% of a number and 18% of the same number is 145.8. What is 30% of that number ? 141 188 162 245 141 188 162 245 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
Number System (2560 x 1.4) +(7400 x 0.6) =? 6543 9160 8024 7234 6543 9160 8024 7234 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8024
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 56 58 60 54 56 58 60 54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.
Number System Find the least value of 3x + 4y if x2y3 = 6. 7 6 10 3 7 6 10 3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = ? 30.52 27.54 29.81 28.56 30.52 27.54 29.81 28.56 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = 70.84 - 40.32 = 30.52
Number System If the fractions 1/7, 3/5, 2/5, 5/6 and 9/11 are arranged in descending order of their values, which one will be the fourth number? 3/5 4/5 1/5 2/5 3/5 4/5 1/5 2/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/4 = 14. 3/5 = 6.2/5 = 4.5/6 = 83.9/11 = 82.Therefore, 83 > 82 > 6 > 14
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