Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 4 5 10 6 4 5 10 6 ANSWER DOWNLOAD EXAMIANS APP
Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 44 45 46 47 44 45 46 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
Number System A laborer is engaged for 30 days on the condition that he receives Rs.25 for each day he works and is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was he absent? 10 6 9 8 10 6 9 8 ANSWER DOWNLOAD EXAMIANS APP
Number System What number should replace both the question marks (?) in the following question ? 85 84 83 82 85 84 83 82 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 84
Number System If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ? 111 101 131 121 111 101 131 121 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be xTherefore x² + (182)² = 47765Therefore x² = 47765 - (182)2 = 47765 - 33124Therefore x² = 14641, Therefore x = 121
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 245 275 225 295 245 275 225 295 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
EXAMIANS