If ‘P’ denotes ‘Multiplication’ ‘Q’ denotes ‘Division’ ‘R’ denotes ‘Addition’ ‘S’ denotes ‘Subtraction’ Then which of the following equation is CORRECT?
If ‘P’ denotes ‘Multiplication’ ‘Q’ denotes ‘Division’ ‘R’ denotes ‘Addition’ ‘S’ denotes ‘Subtraction’ Then which of the following equation is CORRECT? Correct Answer 10P8R4Q2S1= 81
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The logic follows here is:
|
Symbols |
P |
Q |
R |
S |
|
Meaning |
× |
÷ |
+ |
- |
By checking options and inserting codes and then using BODMAS Rule:
(1) 10P8R4Q2S1= 81
LHS = 10 × 8 + 4 ÷ 2 - 1
= 10 × 8 + 2 - 1
= 80 + 2 - 1
= 82 - 1
= 81
= RHS
(2) (12P3R6S4) Q2=40
LHS = (12 × 3 ÷ 6 - 4) ÷ 2
= (12 × 0.5 - 4) ÷ 2
= (6 - 4) ÷ 2
= 2 ÷ 2
= 1 ≠ 40
≠ RHS
(3) 36Q3R2S5Q2=18
LHS = 36 ÷ 3 + 2 - 5 ÷ 2
= 12 + 2 - 2.5
= 14 - 2.5
= 11.5 ≠ 18
≠ RHS
(4) 16R18S4P2Q2=60
LHS = 16 + 18 - 4 × 2 ÷ 2
= 16 + 18 - 4 × 1
= 16 + 18 - 4
= 34 - 4
= 30 ≠ 60
≠ RHS
Hence, "10P8R4Q2S1= 81" is the correct answer.
