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Which two numbers (not digits of the numbers), from amongst the given options, should be interchanged to make the given equation correct?
12×9+27÷3−5=60

  1. A
    27 and 9
  2. B
    12 and 3
  3. C
    12 and 5
  4. D
    5 and 9

Solution & Step-by-step Explanation

Let's evaluate the options to find which swap satisfies the equation by following BODMAS rules:
Test Option A (27 and 9):
The equation becomes:

12×27+9÷3−5
=324+3−5=322

=60
Test Option B (12 and 3):
The equation becomes:

3×9+27÷12−5
This yields a fraction (27/12), so it cannot equal 60.

Test Option C (12 and 5):
The equation becomes:

5×9+27÷3−12
Applying BODMAS:
First, division: 27÷3=9
Next, multiplication: 5×9=45
Substitute back: 45+9−12=54−12=42

=60
CK-12 Foundation

Test Option D (5 and 9):
The equation becomes:

12×5+27÷3−9
Applying BODMAS:
First, division: 27÷3=9
Next, multiplication: 12×5=60
Substitute back: 60+9−9=60
This matches the RHS precisely.

Practice this question

Try it yourself before checking the explanation above.

Which two numbers (not digits of the numbers), from amongst the given options, should be interchanged to make the given equation correct?
12×9+27÷3−5=60
A
27 and 9
B
12 and 3
C
12 and 5
D
5 and 9

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