773 - TENTH

Elon ZuckergaTEs was very wealthy and when he and his wife had children they decided to start off their savings based on their deciduous teeth falling out. So when their first tooth fell out they put $1,000 into their junior bank account. Then for the second tooth, they put in 2²*$1,000 (ie $4,000) making a total of $5,000. By the time half the teeth had fallen out, that is when the tenth tooth fell out, the bank account stood at $385,000 and by the time the last of the 20 teeth fell out the account stood at $2,870,000.

Cross-section of upper and lower jaws with permanent teeth located above and below the deciduous teeth prior to their exfoliation. The deciduous mandibular central incisors have already been exfoliated.