Mensa IQ Test Mensa IQ Blood Relations and Direction Sense 3 — Questions and Answers
Question 1: A is the son of B. C is B's sister. D is C's mother. E is D's husband. How is A related to E?
- Grandson (Correct answer)
- Nephew
- Son
- Great-grandson
Correct answer: Grandson
E is D's husband, and D is C's mother. C is B's sister, so D is also B's mother and E is B's father. A is B's son — so E is A's grandfather (paternal grandfather), making A E's grandson.
Question 2: A girl walks 3 km east, then 4 km north. She then turns to face her starting point. In what direction is she facing?
- Southwest (Correct answer)
- Southeast
- Northwest
- South
Correct answer: Southwest
She is 3 km east and 4 km north of her start; to face the start she must look south (back 4 km) and west (back 3 km), meaning she faces southwest.
Question 3: P's mother has only one son, Q. Q is married to R. R's son is S. How is P related to S?
- Uncle or Aunt (Correct answer)
- Father or Mother
- Brother or Sister
- Grandparent
Correct answer: Uncle or Aunt
P's mother's only son is Q, so Q is P's brother. Q and R are married and S is their son, making S P's nephew — so P is S's uncle or aunt.
Question 4: A man facing northwest walks straight ahead. After 10 km, in what general direction has he moved relative to his start?
- Northeast of his start... no — he moved toward the Northwest (Correct answer)
- He is due north of start
- He is due west of start
- He is southeast of start
Correct answer: Northeast of his start... no — he moved toward the Northwest
Walking while facing northwest means moving in the northwest direction — he is northwest of his starting point.
Question 5: A is B's father. B is C's brother. D is A's mother. E is D's son. How is C related to E?
- Niece or Nephew (Correct answer)
- Sibling
- Grandchild
- Cousin
Correct answer: Niece or Nephew
D is A's mother, and E is D's son — so E is A's sibling (A's brother or sister). B is A's child, and C is B's sibling — so C is A's grandchild. E is A's sibling, so E is C's great-uncle or the relationship is E is C's grandparent's sibling, making C E's grand-niece/nephew.
Question 6: A person walks 5 km north, turns right and walks 5 km, turns right and walks 5 km, turns right and walks 5 km. How far are they from their starting point and in which direction?
- 0 km — they are back at start (Correct answer)
- 5 km south
- 10 km east
- 5 km east
Correct answer: 0 km — they are back at start
North 5, East 5, South 5, West 5 — this traces a complete square, returning exactly to the start.
Question 7: X's son's wife is Y. Y is Z's daughter. How is X related to Z?
- X is Z's son-in-law's parent / co-parent-in-law (Correct answer)
- X is Z's parent
- X is Z's sibling
- X is Z's grandparent
Correct answer: X is Z's son-in-law's parent / co-parent-in-law
Y is Z's daughter and also X's son's wife — Z is Y's parent, X is Y's spouse's parent; they are co-parents-in-law (the parents of a married couple), with no standard single-word English term.
Mensa IQ Test Mensa IQ Blood Relations and Direction Sense 3
A is the son of B.
C is B's sister.
D is C's mother.
E is D's husband.
How is A related to E?