Mensa Mensa IQ Odd One Out Puzzles 5 — Questions and Answers
Question 1: Which does NOT belong? Quartz, Obsidian, Granite, Diamond
- Quartz
- Obsidian (Correct answer)
- Granite
- Diamond
Correct answer: Obsidian
Quartz, Granite, and Diamond are all crystalline minerals or rocks with an ordered atomic structure, while Obsidian is a volcanic glass with a non-crystalline (amorphous) structure.
Question 2: Which number is the odd one out? 16, 25, 36, 48, 64
- 16
- 25
- 36
- 48 (Correct answer)
Correct answer: 48
16, 25, 36, and 64 are all perfect squares (4², 5², 6², 8²), but 48 is not a perfect square.
Question 3: Which word does NOT belong? Stalagmite, Stalactite, Speleothem, Stalwart
- Stalagmite
- Stalactite
- Speleothem
- Stalwart (Correct answer)
Correct answer: Stalwart
Stalagmite, Stalactite, and Speleothem are all geological formations found in caves, while Stalwart means loyal and hardworking and has no geological meaning.
Question 4: Which instrument is the odd one out? Violin, Cello, Harp, Viola
- Violin
- Cello
- Harp (Correct answer)
- Viola
Correct answer: Harp
Violin, Cello, and Viola are all bowed string instruments belonging to the viol family, while Harp is a plucked string instrument of a different family.
Question 5: Which sequence is the odd one out? 2-4-8, 3-6-12, 5-10-20, 4-8-13
- 2-4-8
- 3-6-12
- 5-10-20
- 4-8-13 (Correct answer)
Correct answer: 4-8-13
In 2-4-8, 3-6-12, and 5-10-20 each term doubles the previous one (×2), but in 4-8-13 the third term adds 5 instead of doubling.
Question 6: Which word does NOT belong? Epistle, Memoir, Sonnet, Haiku
- Epistle
- Memoir (Correct answer)
- Sonnet
- Haiku
Correct answer: Memoir
Sonnet and Haiku are poetic forms, and Epistle can also be a type of poem or verse letter, while Memoir is a prose narrative recounting personal experiences.
Question 7: Which does NOT belong? Semaphore, Morse Code, Braille, HTML
- Semaphore
- Morse Code
- Braille
- HTML (Correct answer)
Correct answer: HTML
Semaphore, Morse Code, and Braille are all non-verbal encoding systems designed for direct human communication, while HTML is a markup language for structuring digital documents.
Mensa Mensa IQ Odd One Out Puzzles 5
Which does NOT belong? Quartz, Obsidian, Granite, Diamond