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Edith had nine children at regular intervals of $15$ months.
If the oldest is now six times as old as the youngest, how old is the youngest child?
If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.
Oldest and Youngest
Age 14 to 16
ShortChallenge Level 
Edith had nine children at regular intervals of $15$ months.
If the oldest is now six times as old as the youngest, how old is the youngest child?
If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
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