Number System Which one of the following represents the sum of the first n even numbers? N(N + 1) N2+ 1 N(N – 1) N2 N(N + 1) N2+ 1 N(N – 1) N2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is 44 72 38 56 44 72 38 56 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 72
Number System The difference between the two digit number and the number obtained by interchanging its digits is 54. The difference between the digits is? Nothing can be said. 4 6 1 Nothing can be said. 4 6 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) – (10y + x) = 54x – y = 6
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. 30 50 25 125 30 50 25 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.
Number System 4500 * ? = 3375 1/4 2/5 3/5 3/4 1/4 2/5 3/5 3/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4500 * x = 3375= x = 3375/4500 = 3/4
Number System If 70% of an equal to 40% of b, then ratio between a and b is? 7: 11 7: 4 None 4: 7 7: 11 7: 4 None 4: 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 70 a = 40 ba: b = 4: 7
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