Number System What is the least number, which is perfect square but contains 2700 as its factor? 1800 10800 5400 2700 1800 10800 5400 2700 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System The average of five consecutive even numbers, p, q, r, s and t is 40. What is the product of 'r' and 's' ? 1780 1480 1680 1580 1780 1480 1680 1580 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x, x + 2, x + 4, x + 6, and x + 8Avg = x + x + 2 + x + 4 + x + 6 + x + 8/5 = 40Therefore, 5x + 20 = 200Therefore, x = 180/5 = 36Therefore, r = x + 4 = 40 s = x + 6 = 42Therefore, Product = 1680
Number System What is the value of ? in the following equations ? 72/? = ?/50 40 60 100 80 40 60 100 80 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
Number System √(17)² + (17)² + (5)² - 2 = ? 16 18 17 19 16 18 17 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √49 + 289 + 25 - 2 = √361 = 19
Number System If (72)² is subtracted from the square of a number, the answer thus obtained is 4617. What is the number ? 95 103 92 99 95 103 92 99 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (72)² = 467Therefore, x² = 4617 + 5184Therefore, x² = 9801 Therefore, x = 99
Number System If the fractions8/5,7/2,9/5,5/4,4/5 are arranged in descending order of their values, which one will be fourth? 7/9 1/3 5/4 11/13 7/9 1/3 5/4 11/13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5/4
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