Question
If 18Â &Â 6Â # 32 = 76 and 60Â #Â 6Â &Â 5 = 10, then
15Â &Â 5Â #Â 42=?Solution
Here & means ' × ' and # means ' − ' In, 18 & 6 # 32 = 76 18 × 6 – 32 = 76 108 – 32 = 76 76 = 76 In, 60 # 6 & 5 = 10 40 – 6 × 5 = 15 40 – 30 = 10 10 = 10 Similarly, 15 & 5 # 42=? 15 × 5 – 42 = ? 75 – 43 = 32. Hence, option a.
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