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 13 7 18 15 13 7 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 124, 235, 447, 760, 1174, ? 1589 1489 1389 1689 1589 1489 1389 1689 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP +111, +212, +313, +414
Number System If (72)² is subtracted from the square of a number, the answer thus obtained is 4617. What is the number ? 99 95 103 92 99 95 103 92 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (72)² = 467Therefore, x² = 4617 + 5184Therefore, x² = 9801 Therefore, x = 99
Number System If the L.C.M of two numbers is 750 and their product is 18750, find the H.C.F of the numbers. 50 125 30 25 50 125 30 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.
Number System Supply the missing figure : 2, 6, 12, 20, 30 ... 56 41 40 39 42 41 40 39 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
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