Number Prefixes: Uni-, Mono-, Bi-, Du-, Tri-, Quad-

Which of the number prefixes below mean "one"?

• uni

• bi

• quad

• mono

Which number prefix means three?

• uni

• du

• tri

• quad

Which number prefixes below mean "two"?

• tri

• quad

• bi

• du

Which number prefix means "four"?

• uni

• mono

• bi

• quad

What is a prefix?

• a word part added to the end of a word to change its meaning

• the "root" or "base" of a word

• a word part added to the beginning of a word to change its meaning

• a suffix

What does biannual mean?

• once a year

• twice a year

• three times a year

• four times a year

What does "unison" mean?

• acting alone

• a pair who sings or performs together

• acting as one or at the same time

• clothing that is worn to show one single standard

What is a "monorail"?

• muscles at the front of the thighs made up of four smaller muscles

• a group of three books or movies that tell one story

• a voice that sounds the same all the way through

• a train that travels on a single line or track

What is a "trifecta"?

• a set of three things that come together to produce something important or special

• a group of three books or movies that tell one big story

• something that happens twice a year

• a performance by two people

What does "bilingual" mean?

• an event that happens two times a year

• able to speak two languages fluently

• a performance by two people

• a train that travels on a single rail or line