Mensa IQ Test Mensa IQ Odd One Out Puzzles 2

Question 1

Which number is the odd one out: 2, 4, 6, 8, 9, 10?

Accepted Answer

9

Answer

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?

Accepted Answer

Equation

Answer

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?

Accepted Answer

56

Answer

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?

Accepted Answer

Rectangle

Answer

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?

Accepted Answer

100

Answer

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.

Mensa Practice Test Practice Test

Mensa Practice Test Practice Test

Mensa IQ Test Mensa IQ Odd One Out Puzzles 2