The rules are small. Read them closely.
Every answer follows from the conditions in the question.
Ten questions, with the answers explained. Try them in your head, then open each answer when you're ready.
Play this quiz →QUESTION 1 / 10
A code must be an even number greater than 20 and less than 25. Which option works?
- 20
- 25
- 22
- 23
Show answer & explanation+
22
Only 22 is even and strictly inside the range.
QUESTION 2 / 10
A password here must have exactly four letters and no repeated letters. Which option works?
- APPLE
- MINT
- MOON
- TENT
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MINT
MINT has four different letters. The other options repeat letters or have the wrong length.
QUESTION 3 / 10
Choose a number divisible by both 3 and 5. Which option works?
- 12
- 30
- 20
- 25
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30
Thirty is divisible by both numbers; the others fail at least one condition.
QUESTION 4 / 10
A shelf accepts books under 20 cm tall. Which book fits?
- 25 cm
- 21 cm
- 19 cm
- 20 cm
Show answer & explanation+
19 cm
Under means strictly less than, so a 20 cm book does not qualify.
QUESTION 5 / 10
A ticket is valid at or after 10:00 but before 12:00. Which arrival is valid?
- 11:30
- 12:00
- 12:01
- 09:59
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11:30
11:30 falls within the interval. Exactly noon is excluded by before.
QUESTION 6 / 10
A number has two digits, ends in 4, and is less than 30. Which option fits?
- 40
- 34
- 4
- 24
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24
Twenty-four has two digits, ends in four, and is below thirty.
QUESTION 7 / 10
A box can hold at most 12 marbles. It already has 9. How many more can you add?
- Two
- Five
- Three
- Four
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Three
The unused capacity is twelve minus nine.
QUESTION 8 / 10
A game requires at least four players. Which group is too small?
- Four players
- Five players
- Six players
- Three players
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Three players
At least four includes four and every larger number, but excludes three.
QUESTION 9 / 10
A code must contain one letter followed by two digits. Which option fits?
- 27A
- A27
- AB2
- A2B
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A27
A27 has exactly the required letter-digit-digit arrangement.
QUESTION 10 / 10
Choose the only option with exactly two vowels, counting A, E, I, O, U. Which works?
- CAT
- LIME
- QUEUE
- MYTH
Show answer & explanation+
LIME
LIME contains I and E. CAT has one, QUEUE has four, and MYTH has none by this definition.