Question : Directions: In the following question you have to identify the correct response from the given premises stated according to the following symbols.
If × means addition, – means division, / means subtraction, and + means multiplication, then which of the equations is correct?
Option 1: 25 + 10 – 5 / 10 × 3 = 43
Option 2: 25 – 10 × 5 + 10 / 3 = 72
Option 3: 25 × 10 / 5 + 10 – 3 = 12
Option 4: 25 / 10 + 5 × 10 / 3 = 18
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Correct Answer: 25 + 10 – 5 / 10 × 3 = 43
Solution :
Given:
× means addition, – means division, / means subtraction, and + means multiplication.
Let's check the given options –
First option:
25 + 10 – 5 / 10 × 3 = 43
Now, replace the given symbols –
= 25 × 10 ÷ 5 – 10 + 3
= 25 × 2 – 10 + 3
= 50 – 10 + 3
= 53 – 10
= 43 = R.H.S.
Second option:
25 – 10 × 5 + 10 / 3 = 72
Now, replace the given symbols –
= 25 ÷ 10 + 5 × 10 – 3
= 2.5 + 5 ×10 – 3
= 2.5 + 50 – 3
= 52.5 – 3
= 49.5 ≠ 72
Third option:
25 × 10 / 5 + 10 – 3 = 12
Now, replace the given symbols –
= 25 + 10 – 5 × 10 ÷ 3
= 25 + 10 – 5 × 3.33
= 25 + 10 – 16.65
= 35 – 16.65
= 18.35 ≠ 12
Fourth option:
25 / 10 + 5 × 10 / 3 = 18
Now, replace the given symbols –
= 25 – 10 × 5 + 10 – 3
= 25 – 50 + 10 – 3
= 35 – 53
= –18 ≠ 18
So, only in the first option L.H.S. = R.H.S. Hence, the first option is correct.
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