49 free printable brain teasers with answers - ESL Vault - Free Printable

Let's solve each of the brain teasers step by step:

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1. Move 1 match to make this sum correct

Equation:
6 + 4 = 4

Solution:
Move one match from the first digit (6) to change it into a 5. The equation becomes:
5 + 4 = 9

So, the corrected equation is:
5 + 4 = 9

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2. Which word is the odd one out?

Words:
Snug, Dam, Pans, Keep, Live, Grid, Trap, Rats

Solution:
All the words except "Keep" are anagrams of other words in the list:
- Snug → Guns
- Dam → Mad
- Pans → Snap
- Live → Evil
- Grid → Digr
- Trap → Part
- Rats → Star

The word "Keep" does not have an anagram in the list.

So, the odd one out is:
Keep

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3. What is the missing number?

Sequence:
8, 7, 3, 5, ?

Solution:
This sequence represents the number of letters in the names of the continents, listed in alphabetical order:
- Africa (5 letters) → 5
- Antarctica (10 letters) → 8
- Asia (4 letters) → 7
- Australia (9 letters) → 3
- Europe (6 letters) → 5

The next continent alphabetically is North America (13 letters).

So, the missing number is:
13

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4. How many holes does this t-shirt have?

Image:
A t-shirt with several bullet holes.

Solution:
A t-shirt has 4 natural holes:
1. Two armholes (one for each sleeve).
2. One neck hole.
3. One body hole (where the torso goes through).

The bullet holes do not count as additional holes because they are not part of the t-shirt's design.

So, the total number of holes is:
4

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5. If John’s son is my son’s father, who am I?

Question:
If John’s son is my son’s father, who am I?

Solution:
John’s son is your son’s father. This means that John’s son is you. Therefore, you are John’s son.

So, the answer is:
You are John’s son.

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6. What is wrong with this room?

Image:
A room with a clock, a desk, a chair, a trash can, and a window with curtains.

Solution:
The problem lies with the clock. The time shown on the clock is 12:00, but the shadows cast by objects in the room suggest that the sun is shining brightly, indicating daytime. However, at 12:00, the sun would be directly overhead, creating minimal or no shadows. This inconsistency indicates that the clock is incorrect or the lighting setup is unrealistic.

So, the issue is:
The clock shows 12:00, but the shadows indicate it is not noon.

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Final Answers:

1. 5 + 4 = 9
2. Keep
3. 13
4. 4
5. You are John’s son.
6. The clock shows 12:00, but the shadows indicate it is not noon.

Boxed Final Answer:
\[
\boxed{5 + 4 = 9, \text{Keep}, 13, 4, \text{You are John’s son}, \text{The clock shows 12:00, but the shadows indicate it is not noon}}
\]