Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1240 1300 1260 1280 1240 1300 1260 1280 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1945 1975 1955 1965 1945 1975 1955 1965 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because (x + y)² = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945
Number System What is the difference between the local values of 3 in the number 53403? 0 3030 2997 3003 0 3030 2997 3003 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3000 – 3 = 2997
Number System If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ? 12/25 13/25 3/5 6/7 12/25 13/25 3/5 6/7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
Number System 8988 / 8 / 4 = ? 4494 561.75 2247 280.875 4494 561.75 2247 280.875 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8988 * 1/8 * 1/4 = 2247/8 = 280.875
Number System In how many different ways can the letters of the word FORMULATE be arranged ? 362880 372880 382880 392880 362880 372880 382880 392880 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of letters = 9! = 9*8*7*6*5*4*3*2*1 = 362880
EXAMIANS