Practice30 Create account

The sum of the digits of a two-digit number is 11. If 45 is added to the number, its digits get reversed. Find the number.

Competition practiceNumber System, HCF & LCM

A83
B29
C47
D38

Step-by-Step Solution

Let the number be

10 a + b

with

a + b = 11.10 a + b + 45 = 10 b + a

gives

b - a = 5

, so

a = 3, b = 8

. The number is 38

(38 + 45 = 83)

.

Answer: D) 38

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Number System, HCF & LCM practice questions

More Number System, HCF & LCM practice

Three consecutive odd numbers add up to 81. What is the largest of them?Three consecutive even numbers add up to 66. Find the largest of the three.Geeta thinks of two numbers whose sum is 73 and whose difference is 17. What is the…If two consecutive even numbers add up to 74, find the larger of the two numbers.On division by 9, a certain number leaves remainder 7. What remainder does five times…