Number System What is the least number that should be added to 5200 to make it a perfect square ? 275 225 129 288 275 225 129 288 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.
Number System The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number 636 845 724 673 636 845 724 673 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 least number must be subtracted from 2641 so that the remainder left, when divided by 10,15 and 25, is 7 in each case ? 87 84 81 94 87 84 81 94 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP LCM of 10, 15, 25 = 150When we drive 2641 by 150 the remainder is 91.But the remainder should be 7.So, the number to be subtracted from 2641 is 91 - 7 = 84.
Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 82 83 81 84 82 83 81 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
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 24 18 28 22 24 18 28 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 If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 86 94 97 91 86 94 97 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
EXAMIANS