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Mathematical operation and symbol notation

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  1. If '+' means '-', '-', means 'x' , '÷' means '+' and 'x' means '÷', then
    10 x 5 ÷ 3 - 2 + 3 = ?
    1. 5
    2. 53/3
    3. 21
    4. 36
Correct Option: A

? = 10 x 5 ÷ 3 - 2 + 3
= 10 ÷ 5 + 3 x 2 - 3 (by interchanging sign)
= 2 + 3 x 2 - 3
= 2 + 6 - 3 = 8 - 3 = 5


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