Number System The average of 7 numbers is 15, that of the first three is 6 and that of the last three is 23. What is the fourth number? 18 15 7 13 18 15 7 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4th No. = (Total of 7 Nos) - (Total of first three + total of last 3) = (15 x 7) - (6 x 3 + 23 x 3) = 105 - (18 + 69) =105 - 87 = 18
Number System The square root of 3 + “5 is : “(5/2) + “(1/2) “3 /2 - 1/”2 “3 /2 + 1/”2 “5 /2 - 1/”2 “(5/2) + “(1/2) “3 /2 - 1/”2 “3 /2 + 1/”2 “5 /2 - 1/”2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP “(5/2) + “(1/2)
Number System Find the smallest number which should be multiplied with 520 to make it a perfect square. 55 120 30 None of these 55 120 30 None of these 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? 9/13 8/13 7/13 6/13 9/13 8/13 7/13 6/13 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 Supply the missing figure : 2, 6, 12, 20, 30 ... 56 42 39 41 40 42 39 41 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
Number System Sum of two numbers is 80. Greater number exceeds by 5 from four times of the smaller. Find the numbers? 65, 15 60, 20 62, 18 64, 16 65, 15 60, 20 62, 18 64, 16 ANSWER DOWNLOAD EXAMIANS APP
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