Free IQ Test Online
Thirty puzzles in twenty-five minutes: number and letter series, analogies, odd one out, letter code puzzles, family relations and logic. No maths beyond everyday arithmetic and no special knowledge needed. No sign-up either. Your IQ-style score appears the moment you finish, with every answer explained.
How your score works
Harder puzzles count for more. Your weighted result is placed on a scale from 70 to 145, where 100 is a typical score. It is an IQ-style estimate for fun and practice, not a clinical IQ assessment.
Sample IQ Test questions with answers
1. Find the next number: 7, 10, 20, 23, 46, 49, ?
- A. 95
- B. 96
- C. 98
- D. 100
The operations alternate between adding 3 and multiplying by 2. Thus, 7 + 3 = 10, 10 × 2 = 20, and 49 × 2 = 98.
Discuss this question2. Find the next number: 1, 2, 6, 15, 31, 56, ?
- A. 88
- B. 90
- C. 92
- D. 94
The differences are 1, 4, 9, 16 and 25, which are consecutive squares. The next difference is 36, so 56 + 36 = 92.
Discuss this question3. Find the next number: 4, 6, 10, 16, 24, 34, ?
- A. 42
- B. 44
- C. 46
- D. 48
The differences are 2, 4, 6, 8, and 10, increasing by 2 each time. The next difference is 12, so 34 + 12 = 46.
Discuss this question4. Find the next number: 5, 11, 23, 47, 95, ?
- A. 189
- B. 190
- C. 191
- D. 192
Each term is doubled and then increased by 1. Thus, 95 × 2 + 1 = 191.
Discuss this question5. Find the missing number: 3, 10, 5, 18, 7, 28, 9, ?
- A. 36
- B. 38
- C. 40
- D. 42
The odd-positioned terms are 3, 5, 7, 9, increasing by 2. The even-positioned terms are 10, 18, 28, so their increases are 8, 10, and then 12, giving 40.
Discuss this questionMore free quizzes
IQ Test: common questions
Is this a real IQ test?
It is an IQ-style reasoning test, not a clinical assessment. A real IQ score comes from a supervised, standardised test given by a psychologist. This test uses the same kinds of puzzles and gives you an estimate on the familiar 70 to 145 scale, which makes it good practice and a fair rough guide.
What is a good IQ score?
On the usual scale 100 is average, and about two thirds of people score between 85 and 115. Above 120 is considered high and above 130 very high.
What kind of questions are in the test?
Number and letter series, word and number analogies, odd one out, letter code puzzles (for example, if CAT is written DBU, how is DOG written?), family relations, logical deduction and short everyday number puzzles. No programming or special knowledge is needed, and every question is text based, so it works on any phone.
Will this help with ISSB or army intelligence tests?
Yes, as practice. ISSB, PMA and forces initial tests include verbal and non-verbal intelligence sections built from the same families of puzzle, and timed practice is the best way to get faster at them.
Can I take the test again?
As often as you like. Each attempt draws a fresh set of puzzles, and it is free with no account needed.