Number System Two numbers are in the ratio 3:5. If 9 be subtracted from each, they are in the ratio of 9:17. The first number is: 30 36 18 27 30 36 18 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (3x-9):(5x-9) = 9:17 x = 12 => 3x = 36
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 ? 145714 145314 145214 145914 145714 145314 145214 145914 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Population of the town= 168480 x 115/100 x 75/100= 145314
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1082 1092 1192 1200 1082 1092 1192 1200 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 225 295 275 245 225 295 275 245 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 4 15 7.5 5 4 15 7.5 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
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