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 ? 28 22 24 18 28 22 24 18 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 732.96 + 405.38 - 604.08 - 105.44 + 222.86 = ? 631.68 641.68 651.68 621.68 631.68 641.68 651.68 621.68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1361.20 - 709.52 = 651.68
Number System Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is: 15 9 13 11 15 9 13 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the three integers be x, x + 2 and x+ 4.Then,3x = 2(x + 4) + 3x = 11Third integer = x + 4 = 15.
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 76 75 77 78 76 75 77 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ? 131 101 111 121 131 101 111 121 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 If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 82 83 84 81 82 83 84 81 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
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