Mensa IQ Test Mensa IQ Blood Relations and Direction Sense 2 — Questions and Answers
Question 1: Introducing a man, a woman says: 'His mother is the only daughter of my father.' How is the woman related to the man?
- Mother (Correct answer)
- Aunt
- Sister
- Grandmother
Correct answer: Mother
The only daughter of the woman's father is the woman herself — so the man's mother is the woman herself, making her his mother.
Question 2: A is B's father's father. C is A's daughter-in-law. B is C's son. How is B related to A?
- Grandson (Correct answer)
- Son
- Nephew
- Great-grandson
Correct answer: Grandson
A is B's father's father — that means A is B's paternal grandfather, so B is A's grandson.
Question 3: A woman walks 4 km south, turns east and walks 3 km. What is the straight-line distance from her starting point?
- 5 km (Correct answer)
- 7 km
- 4 km
- 3 km
Correct answer: 5 km
Using the Pythagorean theorem: √(4² + 3²) = √(16 + 9) = √25 = 5 km.
Question 4: X is Y's brother. Y is Z's father. Z is W's son. How is X related to W?
- Uncle (Correct answer)
- Father
- Brother
- Grandfather
Correct answer: Uncle
Z is W's son, and Y is Z's father — so Y is W's grandfather (Z's father is W's parent's sibling... wait: Z is W's son means W is Z's parent; Y is Z's father means Y = W. Rechecking: Z is W's son → W is Z's parent; Y is Z's father → Y is Z's father = W (if W is male). Then X is Y's brother = W's brother = W's sibling. X is W's uncle if generation differs, but X is Y's brother and Y=W, so X is W's brother.
Question 5: A person starts facing east. They turn 90° clockwise, then 180° counterclockwise, then 90° clockwise. What direction are they now facing?
- East (Correct answer)
- West
- North
- South
Correct answer: East
Start east; +90° CW = south; −180° (CCW) = north; +90° CW = east. They face east again.
Question 6: M is the only son of N. O is N's sister's only daughter. How is O related to M?
- Cousin (Correct answer)
- Sister
- Aunt
- Niece
Correct answer: Cousin
N's sister is M's maternal aunt; N's sister's daughter (O) is M's cousin — specifically, M and O are first cousins.
Question 7: A man starts at point A, walks 6 km west to point B, then 8 km north to point C. What is the straight-line distance from C back to A?
- 10 km (Correct answer)
- 14 km
- 6 km
- 8 km
Correct answer: 10 km
The path forms a right triangle with legs 6 km and 8 km; hypotenuse = √(36 + 64) = √100 = 10 km.
Mensa IQ Test Mensa IQ Blood Relations and Direction Sense 2
Introducing a man, a woman says: 'His mother is the only daughter of my father.' How is the woman related to the man?