Vishva plays football every 4th day. He played on a Tuesday. He plays football on a Tuesday again in is _____ days.

Correct Answer: 28

Solution

Since he plays every 4 days, the day of the week shifts each time, and it returns to Tuesday only after a number of days that is a multiple of both 4 and 7. The smallest such number is the LCM of 4 and 7, which is $$4 \times 7 = 28$$ days.

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