13
Question
Ravi eats chocolate every 5th day, and muffin every 7th day.
If today he ate both, after how many next he will eat those two together again?
Ravi eats chocolate every 5th day, and muffin every 7th day.
If today he ate both, after how many next he will eat those two together again?
45
35
30
40
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Solution
The correct option is B 35
Next time he will eat both these together will be the LCM of the 5 and 7.
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45...
Multiples of 7: 7, 14, 21, 28, 35, 42, 49...
LCM of 5 and 7 = 35
Thus, he will next eat both the items together after 35 days.
Next time he will eat both these together will be the LCM of the 5 and 7.
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45...
Multiples of 7: 7, 14, 21, 28, 35, 42, 49...
LCM of 5 and 7 = 35
Thus, he will next eat both the items together after 35 days.
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