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) N2 + 1 N(N + 1)/2 N2 N(N + 1) N2 + 1 N(N + 1)/2 N2 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ? 24.84 21.84 27.84 25.84 24.84 21.84 27.84 25.84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84
Number System On dividing number by 5, we get 3 as remainder. What will be the remainder when the square of this number is divided by 5? 0 4 2 1 0 4 2 1 ANSWER DOWNLOAD EXAMIANS APP
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 36 16 23 42 36 16 23 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is 110 93 74 85 110 93 74 85 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 85
Number System The difference between a two-digit number and the number obtained by interchanging its two digits is 45. The sum of the digit of the number is 9. What is the product of the two digits of the number? 15 13 12 14 15 13 12 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.Therefore, x + y = 9 ..................(i)10x + y - (10y + x) = 4510x + y - 10y - x = 45Therefore, x - y = 5 ..................(ii)From (i) and (ii), x = 7, y = 2Number = 72Therefore, = x x y = 7 x 2 = 14
EXAMIANS