Plural Quiz (Plurals)
This plural quiz has 15 questions on plural nouns, easy and tricky, and every answer comes with a quick explanation. No sign-up needed.
15 questionsMixed (easy → hard)~3 minNo timer
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This plural quiz tests how well you know English plural forms, from simple rules to the irregular words that catch people out. You'll meet regular -s and -es plurals (potatoes, pianos), -f words that change to -ves (leaves, knives), vowel-change plurals (teeth, mice), Latin and Greek borrowings (cacti, criteria, bacterium) and compound nouns such as passers-by.
It suits students revising grammar, teenagers and adults who want to brush up their English, and anyone who simply enjoys a word challenge. The 15 questions run from easy to hard and include a "spot the wrong plural" question and a "same in singular and plural" question, so it doubles as a quick singular and plural quiz.
Every answer comes with a one-line explanation of the rule behind it, which makes plural forms easier to remember than a list. If you get one wrong, read the explanation, then try to think of two more words that follow the same pattern.
We start with the question many people search for: what is the plural of quiz? It is "quizzes", with a double z. When a one-syllable word ends in a short vowel plus a single z, the z doubles before -es, which keeps the vowel short, just as "whiz" becomes "whizzes". So if you have ever wondered about "quiz ka plural" or why the plural of quiz is quizzes, now you know. And "trivia"? It began life as a Latin plural.
Plurals questions with answers
Show answers
What is the plural of "quiz"?
- Quizes
- Quizzes
- Quizs
- Quizies
Answer: Quizzes. Quiz ends in a short vowel followed by a single z, so the z doubles before -es, giving "quizzes". "Whiz" works the same way.
What is the plural of "child"?
- Childs
- Childrens
- Children
- Childes
Answer: Children. "Children" is an irregular plural. "Childrens" is a common mistake: children is already plural.
What is the plural of "mouse" (the animal)?
- Mice
- Mouses
- Meece
- Mices
Answer: Mice. Mouse becomes mice by changing its vowel, as louse becomes lice. For the computer device, both "mice" and "mouses" are seen.
What is the plural of "tooth"?
- Tooths
- Teeths
- Toothes
- Teeth
Answer: Teeth. Tooth changes its vowel to make teeth, just as foot becomes feet and goose becomes geese.
What is the plural of "potato"?
- Potatos
- Potatoes
- Potatoe
- Potaties
Answer: Potatoes. Many nouns ending in -o take -es, including potatoes, tomatoes, heroes and echoes.
What is the plural of "piano"?
- Pianoes
- Pianoies
- Pianos
- Pianose
Answer: Pianos. Some -o words, often borrowed or shortened ones such as piano, photo and video, just add -s.
What is the plural of "leaf" (as on a tree)?
- Leaves
- Leafs
- Leafes
- Leavs
Answer: Leaves. Many nouns ending in -f or -fe change to -ves: leaf becomes leaves, knife becomes knives, wolf becomes wolves.
Which of these is a correct plural of "cactus"?
- Cactae
- Cactis
- Cactuss
- Cacti
Answer: Cacti. Cactus keeps its Latin plural "cacti", though the English-style plural "cactuses" is also accepted.
What is the plural of "criterion"?
- Criterias
- Criteria
- Criteriae
- Criteriums
Answer: Criteria. Criterion comes from Greek, where -on becomes -a in the plural. "Criteria" is already plural, so "criterias" is wrong.
Which of these nouns has the SAME form in the singular and the plural?
- Goat
- Cow
- Sheep
- Horse
Answer: Sheep. One sheep, two sheep. Deer, aircraft and species work the same way.
Which of these plurals is WRONG?
- Wolves
- Heroes
- Knifes
- Feet
Answer: Knifes. The plural of knife is "knives": the -fe changes to -ves. The other three plurals are correct.
What is the plural of "passer-by"?
- Passer-bys
- Passers-bys
- Passer-byes
- Passers-by
Answer: Passers-by. In compound nouns the main word takes the plural. Here that is "passer", so it is passers-by, like mothers-in-law.
The word "trivia" comes from Latin, where it is the plural of which word?
- Trivium
- Trivion
- Trivius
- Trivio
Answer: Trivium. In Latin a "trivium" was a place where three roads meet. In English "trivia" is now usually treated as a mass noun.
What is the singular of "bacteria"?
- Bacteriam
- Bacterium
- Bacterion
- Bacterius
Answer: Bacterium. Bacteria is the plural of "bacterium", just as data is the plural of datum.
What is the plural of "ox"?
- Oxes
- Oxi
- Oxs
- Oxen
Answer: Oxen. Oxen keeps an old English plural ending, -en, which also survives in "children" and "brethren".
Frequently asked questions
Where can I find plurals questions with answers?
On this page. There are 15 plurals questions, and each shows the correct answer and the rule behind it as soon as you answer. The full answer key is also listed further down the page.
What is the plural of quiz?
The plural of quiz is "quizzes", with a double z. Because quiz ends in a short vowel followed by a single z, the z is doubled before adding -es.
How many questions are in this plurals quiz?
There are 15 multiple-choice questions, each with four options. They move from easy to hard and take about four minutes to finish.
Can I play the plurals quiz online for free without signing up?
Yes. The quiz is free and needs no account. Just press Start, answer the questions and get your score instantly.