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 25 30 50 125 25 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.
Number System Subtracting 30 from a number, the remainder is one fourth of the number. Find the number? 22 1/2 30 45 40 22 1/2 30 45 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/4 x = 30 => x = 40
Number System If the difference between a number and its 2/5 is 240, find the number. 480 440 360 400 480 440 360 400 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
Number System What is the least number, which is perfect square but contains 2700 as its factor? 2700 1800 10800 5400 2700 1800 10800 5400 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System In a fraction, twice the numerator is two more than the denominator. If 3 is added to the numerator and the denominator each, then the resultant fraction will be 2/3 .What was the original fraction 11/12 7/12 19/12 17/12 11/12 7/12 19/12 17/12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7/12
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 60 54 58 56 60 54 58 56 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.
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