ate, eight, 8

You may have used this while texting, or perhaps you have seen it in a "rebus"--

Ate or ate is the past tense ( yesterday, or some time ago ) of eat--
We ate already.
We ate at the new restaurant.

Eight or eight ( rhymes with ate ) means 8, the number 8--
There were eight people at the party.
There were 8 people at the party.
The movie is at 8 o'clock.
The movie is at eight o'clock.

Now that you know that, you can say--
"Eight of us ate at 8 o'clock."

Note--eighteen is 18---the legal age of adulthood for many purposes--
When I am 18, I will register to vote.
When I am eighteen, I will register to vote.
Eighty is 80--a very old person, or 4x20--
My grandmother is almost 80 years old.
My grandmother is almost eighty years old.