Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1240 1280 1300 1260 1240 1280 1300 1260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System If the numerator of a fraction is decreased by 12.5% and the denominator is increased by 180% the resultant fraction is 1/2. What is the original fraction ? 8/5 7/5 1/5 3/5 8/5 7/5 1/5 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the original fraction be x/y.∴ x x 87.5/100/y x 280/100 = 1/2or 87.5x/280y = 1/2∴ 175x = 280y∴ x/y = 280/175 = 8/5
Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 12 180 28 160 12 180 28 160 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System Twenty times a positive integer is less than its square by 96. What is the integer? Cannot be determined 24 30 20 Cannot be determined 24 30 20 ANSWER DOWNLOAD EXAMIANS APP
Number System A man engaged a servant on the condition that he would pay him Rs.900 and a uniform after one year service. He served only for 9 months and received uniform and Rs.650, find the price of the uniform? Rs.100 Rs.85 Rs.90 Rs.80 Rs.100 Rs.85 Rs.90 Rs.80 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9/12 = 3/4 * 900 = 675 650 ------------- 251/4 -------- 251 --------- ? => Rs.100
Number System √207.36 = ? 16.7 14.4 12.3 15.7 16.7 14.4 12.3 15.7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √207.36 = √20736/√100 = 144/10 = 14.4
EXAMIANS