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 Supply the missing figure : 1, 4, 9, 16, 25 .... 49 16 42 36 23 16 42 36 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number 673 845 636 724 673 845 636 724 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100 = 636
Number System If a number is multiplied by. three-fourth of itself, the value thus obtained is 10800. What is that number ? 120 180 60 260 120 180 60 260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 3x/4 = 10800= x² = 10800 x 4/3 = 14400∴ x = √14400 = 120
Number System (1024—263—233)÷(986—764— 156) =? 8 6 None of these 10 8 6 None of these 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8
Number System A number exceeds by 25 from its 3/8 part. Then the number is? 35 39 32 40 35 39 32 40 ANSWER DOWNLOAD EXAMIANS APP
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