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Mathematical Puzzles and Logic Problems
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In three more years, Miguel's grandfather will be six times as old as Miguel was last year. When Miguel's present age is added to his grandfather's present age, the total is 68. How old is grandfather now?
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A
57
💡 Explanation:
From the previous problem, Miguel is 11 years old. Since M+G=68, the grandfather is 68-11=57 years old. Verification: in 3 years grandfather will be 60, which is 6 times Miguel's age last year (10×6=60). All conditions are satisfied.