please check:

Question

Decide what number or description is indicated by the capitalzied words by using your knowledge about prefixes.

1. Our group sat in a SEMICIRCLE.
half circle

2. An OCTOPUS has _____ arms.
eight

3. Our city celebrated its SESQUICENTENNIAL.
150 years

4. A DECATHLON has _____ separate events.
ten

5. OCTOGENARIANS are people who are in their _____.
eighties

6. How often is a BIANNUAL magazine published?
twise

7. The J.F. Max Company celebrated its CENTENNIAL.
100 year anniversary

8. The acting DUET consisted of _____ acters.
two

9. He positioned his camera on a TRIPOD before the play started.
three

10. A year LESS than a DECADE is _____ years.
nine

thanks

Answer 1

Right.