Question 28
Back to Exercise
A two-digit number is 3 more than 4 times the sum of its digits. If 18 is added to the number, its digits are reversed. What is the number?
- A 53
- B 47
- C 24
- D 35 Correct
Correct Answer: Option D
10a + b = 4(a + b) + 3 → 6a − 3b = 3 → b = 2a − 1
Adding 18 reverses: b − a = 2
2a − 1 − a = 2 → a = 3, b = 5
Number = 35
Answer: 35
Discussion & Comments 0
Share your method, a shortcut, or ask about a step you didn't follow.
No comments yet. Be the first to share your solution!