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If 'X' stands for '+', 'Y' stands for '-', 'Z' stands for '×', and 'W' stands for '÷', then evaluate: $15\ W\ 3\ X\ 2\ Y\ 4$ = ?

1. 1
2. 3
3. 5
4. 7

Correct answer: 3

Solution

Substituting the symbols gives $15\div 3+2-4$. By BODMAS, $15\div 3=5$, then $5+2-4=3$. Hence the answer is 3.

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