Memory Numerical PrefixesVersión en línea Practice identifying number-based prefixes. por Marc Hughes tri- A dollar has... deca- A three wheeled bike One hundred pennies 10 octo- decade centi- every two years. Four identical siblings would be... Ten years is a... Quadruplets quad- 8 Some that happens biannually takes place... 4 Eight legged sea creature Octopus 100 Tricycle 3