Number System In a two-digit number, the digit in unit's place is two more than three times the digit in ten's place. If the sum of the two digits is 10, what is the number ? 22 28 18 24 22 28 18 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ y = 3x + 2 .......(i)And, x + y = 10 ......(ii)From (i) and (ii), x = 2, y = 8∴ Number = 28
Number System The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number 636 673 845 724 636 673 845 724 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100 = 636
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 343 382 378 396 343 382 378 396 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System What is the difference between the largest number and the least number written with the digits 7, 3, 1, 4? 5084 6048 6184 6084 5084 6048 6184 6084 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 ? 275 245 295 225 275 245 295 225 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 The number of prime factors of (6)10×(7)17×(55)27 91 41 101 61 91 41 101 61 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
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