How to Solve Logical Reasoning Linear Equations with One Variable?

By Team Aakash Byju's | 13th January 2023

The digit in the ten's place of a two-digit number is 3 more than the digit in the unit’s place. Let the digit at the unit's place be b. Then the number is A B C D 10b+3 11b+3 11b+30 10b+30

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Detailed Explanation

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Firstly, let us write the condition for each digit of the two-digit number.

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b and b+3 are just the face values of the number. Now, we need to find their place values.

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The place value of the digit in the unit’s place is 1 => 1×(b) = b.

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The number can be found by adding the place values of both digits. So, the number is

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How to Solve Logical Reasoning Linear Equations with One Variable?

Detailed Explanation

The correct answer is C. 11b+30.

Firstly, let us write the condition for each digit of the two-digit number.

b and b+3 are just the face values of the number. Now, we need to find their place values.

The place value of the digit in the unit’s place is 1 => 1×(b) = b.

The place value of the digit in the ten’s place is 10 => 10×(b+3) = 10b + 30.

The number can be found by adding the place values of both digits. So, the number is

=> (10b + 30) + b = 11b + 30.

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