Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 5 3 11 7 5 3 11 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 25xy = 144(x- y)2 = (x + y)2 – 4xy(x- y)2 = 625 – 576 => (x – y) = 7
Number System Which one of the following represents the sum of the first n even numbers? N(N – 1) N(N + 1) N2+ 1 N2 N(N – 1) N(N + 1) N2+ 1 N2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System √(17)² + (17)² + (5)² - 2 = ? 17 19 18 16 17 19 18 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √49 + 289 + 25 - 2 = √361 = 19
Number System In how many different ways can be the letters of the word PENCIL be arranged among themselves ? 860 640 720 510 860 640 720 510 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total six letters are there and hence the number of arrangements = 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System Which choice provides the answer : If 2 + 3 = 10, 6 + 5 = 66, 7 + 2 = 63, 9 + 7 = 144 then, 8 + 4 = ? 102 114 88 96 102 114 88 96 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 96
Number System 7432 ÷ 32 x ? = 2787 12 21 78 41 12 21 78 41 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7432/32 x ? = 2787= ? = 2787 x 32/7432 = 12
EXAMIANS