IQ Test Quiz: 10 Questions on Logic, Numbers and Patterns

This IQ test quiz gives you ten questions in the style of classic intelligence puzzles, with number series, letter patterns, analogies, odd one out questions, clock problems and short logic chains like those found in Mensa practice puzzles and Raven's Progressive Matrices. It is for fun and practice, not an official IQ score.

Start IQ Test Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 90 Seconds

Question 1 / 10 Time: 90s

Numbers
What number comes next in this series: 3, 6, 11, 18, 27, ...?
Odd one out
Which of these is NOT a pure chemical element: copper, iron, bronze or silver?
Analogies
Finger is to hand as toe is to what?
Logic
Some cats are pets. All pets are loved. Which statement must be true?
Letters
Which letter comes next: B, E, H, K, ...?
Clocks
A clock shows 3:15. What is the angle between the hour hand and the minute hand?
Anagrams
If you rearrange the letters CIFAIPC, you get the name of what?
Numbers
Which number does not belong: 9, 25, 49, 63?
Ordering
Tom is taller than Ann. Ann is taller than Joe. Joe is taller than Kim. Who is the second shortest?
Problem solving
It takes 6 minutes to cut a log into 3 pieces. At the same speed, how long does it take to cut it into 6 pieces?

Explanations: answer key for all 10 questions

Q1: What number comes next in this series: 3, 6, 11, 18, 27, ...?
Answer: 38
The gaps grow by two each time: plus 3, plus 5, plus 7, plus 9, so the next step is plus 11, which gives 38.
Q2: Which of these is NOT a pure chemical element: copper, iron, bronze or silver?
Answer: Bronze
Bronze is an alloy, a mixture made mostly of copper and tin. Copper, iron and silver are all elements on the periodic table.
Q3: Finger is to hand as toe is to what?
Answer: Foot
A finger is a part of the hand, and a toe is a part of the foot. A shoe covers the foot but is not part of the body.
Q4: Some cats are pets. All pets are loved. Which statement must be true?
Answer: Some cats are loved
The cats that are pets must be loved, because all pets are loved. We know nothing about cats that are not pets, so we cannot say all cats are loved.
Q5: Which letter comes next: B, E, H, K, ...?
Answer: N
Each letter jumps forward three places in the alphabet: B, E, H, K and then N. Letter series test how quickly you spot a fixed step.
Q6: A clock shows 3:15. What is the angle between the hour hand and the minute hand?
Answer: 7.5 degrees
The minute hand points at 3, but the hour hand has moved a quarter of the way toward 4. A quarter of 30 degrees is 7.5 degrees.
Q7: If you rearrange the letters CIFAIPC, you get the name of what?
Answer: An ocean
The letters spell PACIFIC, the largest ocean on Earth. Anagram questions test how flexibly you can rearrange information in your head.
Q8: Which number does not belong: 9, 25, 49, 63?
Answer: 63
9, 25 and 49 are square numbers, made by multiplying 3, 5 and 7 by themselves. 63 is not the square of any whole number.
Q9: Tom is taller than Ann. Ann is taller than Joe. Joe is taller than Kim. Who is the second shortest?
Answer: Joe
From tallest to shortest, the order is Tom, Ann, Joe and Kim. Kim is the shortest, so Joe is the second shortest.
Q10: It takes 6 minutes to cut a log into 3 pieces. At the same speed, how long does it take to cut it into 6 pieces?
Answer: 15 minutes
Three pieces need only two cuts, so each cut takes 3 minutes. Six pieces need five cuts, which take 15 minutes in total.

IQ Test Quiz – How Intelligence Puzzles Work

IQ stands for intelligence quotient, a score that compares how a person performs on reasoning tasks with other people of the same age. Real IQ tests are given by trained psychologists, take an hour or more and are carefully standardized. Online quizzes like this one cannot give you a real score, but they use the same types of questions and are a fun way to exercise your brain.

The idea of measuring intelligence began in France in the early 1900s, when psychologist Alfred Binet created a test to find children who needed extra help at school. Later versions, such as the Stanford-Binet and the Wechsler scales, became widely used. The average IQ score is set at 100, and most people score between 85 and 115.

Many intelligence tests include number series, letter patterns, analogies and odd one out questions. Raven's Progressive Matrices, created in 1936, uses only shapes and patterns, so it does not depend on language. The high-IQ society Mensa, founded in Britain in 1946, accepts people who score in the top 2 percent on approved tests.

Questions like these reward careful reading as much as quick thinking. In the log puzzle, the trick is to count the cuts rather than the pieces. In the cat question, you must avoid assuming more than the facts allow. Training yourself to slow down and check each step is one of the best ways to improve at puzzles.

Scientists also point out that intelligence has many sides, including creativity, memory, language and practical problem solving. A single number cannot capture everything a person can do.

Please note: this quiz is made for fun and brain practice. It is not a standardized intelligence test and it does not measure or give an IQ score.

What This Quiz Teaches

This quiz is perfect for puzzle fans, students and anyone curious about IQ-style questions.

How to find the rule in number and letter series
How analogies and odd one out questions work
Simple logic chains with all and some
How to solve clock angle problems
Why counting cuts matters in puzzle questions
What IQ scores mean and where IQ tests came from

Quick Facts About IQ Tests

Alfred Binet published his first intelligence test in 1905.
The word IQ was popularized by psychologist Lewis Terman.
Average IQ scores rose over the 20th century, a pattern called the Flynn effect.
Mensa has members in more than 100 countries.
Most IQ tests are updated and re-normed every few decades.
Puzzle practice can raise test scores without changing general intelligence.