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  1. If S means '-', Q means 'x' , R means '÷' and P means '+' then
    1   P   45   R   2   Q   2   S   4 = ?
    1. 40
    2. 42
    3. 36
    4. 46
    5. 38
Correct Option: B

After replacing the sign according to question
1   P   45   R   2   Q   2   S   4
Apply the BODMAS Rule
= 1 + 45 ÷ 2 x 2 - 4
= 1 + 22.5 x 2 - 4
= 1 + 45 - 4 = 42


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