Number System Which one of the following is the sum of the numbers 1, 3, 5, 7, 9…. up to nth number? N(N + 1)/2 N2 + 1 N(N + 1) N2 N(N + 1)/2 N2 + 1 N(N + 1) N2 ANSWER DOWNLOAD EXAMIANS APP
Number System If the fraction 8/6, 7/5, 18/13, 9/5 and 7/11 are arranged in descending order of their values, which one will be the second ? 2/7 1/9 7/5 3/4 2/7 1/9 7/5 3/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8/6 = 1. 333, 7/5 = 1.4, 18/13 = 1.3849/5 = 1.8 and 7/11 = 0.636Therefore, Descending order is 9/5 > 7/5 > 18/13 > 8/6 > 7/11Therefore Second fraction is 7/5
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 295 275 245 225 295 275 245 225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
Number System If the fractions8/5,7/2,9/5,5/4,4/5 are arranged in descending order of their values, which one will be fourth? 7/9 5/4 11/13 1/3 7/9 5/4 11/13 1/3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5/4
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 495 490 480 485 495 490 480 485 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 91 97 86 94 91 97 86 94 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
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