Number System What is the least number, which is perfect square but contains 2700 as its factor? 1800 5400 2700 10800 1800 5400 2700 10800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System The average age of seven boys sitting in a row facing North is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the b 31 years 29 years 30 years 28 years 31 years 29 years 30 years 28 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Age of the fourth boy = (26 x 7 - 3 x 19 - 3 x 32) years = (182 - 57 - 96) years = 29 years
Number System The population of a town increases by 15% in the first year and decreases by 25% in the second year. If its current population is 168480 then what will be its population after two years ? 145214 145314 145914 145714 145214 145314 145914 145714 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Population of the town= 168480 x 115/100 x 75/100= 145314
Number System If 1.5 x= 0.04 y, then the value of (y-x) (y+x) is: 93/77 77/73 83/77 73/77 93/77 77/73 83/77 73/77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 73/77
Number System The product of two consecutive odd numbers is 4095 What is the greater number ? 74 69 61 65 74 69 61 65 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the two consecutive odd numbers be 2x - 1 and 2x + 1.(2x - 1) (2x - 1) = 4095= 4x² - 1 = 4095= 4x² = 4096= x² = 1024∴ x = 32∴ The numbers are 63 and 65.Greater number = 65
Number System Which is the smallest fractions among the following ? 15/19 13/15 27/31 11/13 15/19 13/15 27/31 11/13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 11/13 = 0.8461,13/15 = 0.8666,27/31 = 0.87,15/19 = 0.789
EXAMIANS