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 20 40 None of these 30 20 40 ANSWER DOWNLOAD EXAMIANS APP
Number System If the following fractions 7/6, 6/7, 5/3, 8/13 and 6/5 are arranged in descending order, which will be the last in the series? 6/13 9/13 7/13 8/13 6/13 9/13 7/13 8/13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7/6 = 1.166, 6/7 = 0.857,5/3 = 1.66,8/13 = 0.615,6/5 = 1.2Therefore, 5/3 > 6/5 > 7/6 > 6/7 > 8/13
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1092 1200 1082 1192 1092 1200 1082 1192 ANSWER DOWNLOAD EXAMIANS APP
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' ? 1480 1680 1780 1580 1480 1680 1780 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 Supply the missing figure : 2, 6, 12, 20, 30 ... 56 39 40 41 42 39 40 41 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
Number System The Twenty-First Century will start on January 1 in the year 2000 2001 2100 2101 2000 2001 2100 2101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2001
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