Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 61480 60480 63480 62480 61480 60480 63480 62480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 7 5 11 3 7 5 11 3 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 Pick the wrong number from the given number series. 3,4,10,33,135,685,4116 33 685 135 10 33 685 135 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The correct number is 136.3 x 1 + 1 = 44 x 2 + 2 = 1010 x 3 + 3 = 3333 x 4 + 4 = 136136 x 5 + 5 = 685685 x 6 + 6 = 4116
Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1300 1280 1260 1240 1300 1280 1260 1240 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 79 71 74 83 79 71 74 83 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
Number System (800 / 64) * (1296 / 36) = ? None of these 460 420 500 None of these 460 420 500 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given Exp.= 800/64 * 1296/36 = 12.5 * 36 = 450