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When clark was 7 years old he had 22 rare coins. Each year Clark added 15 coins to hiss collection. Assuming Clark does not sell or lose any coins, how old will Clark be when he has 577 coins?

 Jan 28, 2020
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at 7  y/o he hadd 22 coins      He added  (577-22) = 555 coins over the years

 

7 yrs   +   555 coins/15 coins/yr   =   7 +  37 yrs = 44 y/o

 Jan 28, 2020

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