Question 4

If P means '$$\div$$', R means '$$\times$$', Q means '$$+$$' and S means '$$-$$' then 48 P 8 Q 6 R 9 S 31 =?

Solution
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$$=48 \div8 + 6 \times 9 - 31$$

$$=6 + 54 - 31$$

$$=29$$

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