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Question 132
In a certain code language, 426 means 'board is black', 213 means 'chalk is white', 523 means 'black or white'. Find the code for 'or'.
Solution
426 means 'board is black' ---(1)Â
213 means 'chalk is white' ---(2)
By (1) and (2),
2 = is
523 means 'black or white' ---(3)
By (2) and (3),
3 = white
so,
Or = 5
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