Browse · MATH Print → jmc number theory intermediate Problem My father's age is 12223, in base three to represent his three lower limbs -- two legs and a cane. How old is he in base ten? Solution — click to reveal 12223=2⋅30+2⋅31+2⋅32+1⋅33=2+6+18+27=53. Final answer 53 ← Previous problem Next problem →