Mensa IQ Test Mensa IQ Odd One Out Puzzles 2 — Questions and Answers
Question 1: Which number is the odd one out: 2, 4, 6, 8, 9, 10?
- 9 (Correct answer)
- 2
- 10
- 6
Correct answer: 9
All numbers except 9 are even (divisible by 2). 9 is the only odd number in the set, as 9 ÷ 2 = 4.5, which is not a whole number.
Question 2: Which does NOT belong: addition, subtraction, multiplication, equation, division?
- Equation (Correct answer)
- Addition
- Subtraction
- Division
Correct answer: Equation
Addition, subtraction, multiplication, and division are the four basic arithmetic operations. An equation is a mathematical statement, not an operation — it expresses equality between two expressions.
Question 3: Which number does NOT fit: 11, 22, 33, 44, 56, 66?
- 56 (Correct answer)
- 11
- 33
- 66
Correct answer: 56
11, 22, 33, 44, and 66 are all multiples of 11 with repeated digits. 56 is not a multiple of 11 (56 ÷ 11 = 5.09) and doesn't have repeated digits.
Question 4: Which shape is the odd one out: cube, sphere, cylinder, pyramid, rectangle?
- Rectangle (Correct answer)
- Cube
- Sphere
- Pyramid
Correct answer: Rectangle
Cube, sphere, cylinder, and pyramid are all three-dimensional objects (solids). A rectangle is a two-dimensional shape (a flat figure), making it categorically different.
Question 5: Which number does NOT belong: 1, 8, 27, 64, 100, 125, 216?
- 100 (Correct answer)
- 1
- 8
- 216
Correct answer: 100
All others are perfect cubes: 1³, 2³, 3³, 4³, 5³, 6³. But 100 is not a perfect cube — it's 10², a perfect square. The cube root of 100 is approximately 4.64.
Question 6: Which letter does NOT belong: A, E, I, O, B?
- B (Correct answer)
- A
- E
- O
Correct answer: B
A, E, I, and O are vowels in the English alphabet. B is a consonant, making it the odd one out in this group of letters.
Mensa IQ Test Mensa IQ Odd One Out Puzzles 2
Which number is the odd one out: 2, 4, 6, 8, 9, 10?