Number System

Unit Digit

Easy

A number consists of two digits whose sum is 8. If 18 is added to the number, its digits are interchanged. The number is

✅ Correct Option: 2

Just go through the options!

We can see that sum of the digits of every number is 8, so let's look at the second condition.

Look at Option 2 and we'll see that $35+18=53$ , which confirms the second condition. Hence 35 is the answer.

JIPMAT 2022

A two digit number is 7 times the sum of its two digits. The number that is formed by reversing its digits is 18 less than the original number. What is the number?

JIPMAT 2021

The digit in the unit's place of the number represented by $(7^{95} - 7^{58})$ is

A number consists of two digits whose sum is 8. If 18 is added to the number, its digits are interchanged. The number is

Solution

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