# Simplification- Aptitude Questions and Answers - in Hindi

 If the digits of a two digit number are interchanged the newly formed number is more than the original number by 18 and sum of the digit is 8 then what was the original number? यदि दो अंको की एक संख्या के अंको को आपस में बदल दिया जाये तो इस प्रकार प्राप्‍त नयी संख्या मूल संख्या से 18 अधिक है और संख्या के अंको का योग 8 है, तो मूल संख्या क्या थी ? A) 53 B) 26 C) 35 D) 42 Correct Answer : 35 Explanation :Let the digits of number x and y, where x is the tens place, y is the ones place that means Number is: 10x + y As given the sum of the digits is 8. x + y = 8 -------------eq1 If the digits are reversed, the new number is 18 greater than the original number. 10y + x = 18 + 10x + y y - x = 2 y = 2 + x --------------eq2 Substitute value of eq2 in eq1 x + 2 + x = 8 2x = 6 x = 3 So, y = 2 + x = 2 + 3 = 5 Hence number is: 10x + y = 10*3 + 5 = 35 Post/View Answer Post comment Cancel Thanks for your comment.! Write a comment(Click here) ...