Five Brilliant Brain Teasers For The Week (07/07/25)

This week’s set includes two light, smile-inducing riddles, two logic-based challenges, and one difficult classic of deduction. Ready to puzzle through your week?

Scroll slowly — answers are at the end!

🧠 1. The Missing Cup (Easy)

You walk into a room with a table.

On the table are three cups arranged in a line: two facing up, one facing down.

You're allowed to touch two cups at a time, and when you do, you must flip both (up becomes down, and down becomes up).

Can you make all cups face up at the same time — and if so, how?

🧠 2. The Egg Carton (Easy)

You have a dozen eggs in a carton.

If you take three eggs,

How many do you have?

🧩 3. The Bridge Dilemma (Medium)

A farmer is traveling with a fox, a chicken, and a bag of grain.

He comes to a bridge that can only support him and one item at a time.

He cannot leave the fox alone with the chicken, or the chicken with the grain.

How does he get all three across safely?

🧩 4. The Coin Weighing (Medium)

You have 8 identical-looking coins, but one is slightly heavier.

You have a balance scale and can use it only twice.

How do you find the heavier coin?

🧠💥 5. The Truth-Teller and the Liar (Hard)

You are at a fork in the road.

One path leads to certain doom, the other to safety.

There are two people standing at the fork:

One always tells the truth

One always lies

You don’t know which is which.

You can ask only one question to one person to find the correct path.

What do you ask?

✅ Answers Below (How many did you crack?)

1. The Missing Cup

Yes — you can get all cups face up in a few moves. Here's one way:

Flip the first and second cup

Flip the second and third cup

Flip the first and second cup again

Each time, follow the rule: flip exactly two cups.

Eventually, all will be facing up. ✅

2. The Egg Carton

You have three eggs — the ones you took!

Answer: 3

3. The Bridge Dilemma

Take the chicken across

Go back alone

Take the fox across

Bring the chicken back

Take the grain across

Come back alone

Take the chicken across again

Result: All three are safely across. ✅

4. The Coin Weighing

Divide the coins into three groups: 3, 3, and 2

Weigh the two groups of 3

If equal → the heavier coin is in the group of 2

If not equal → the heavier is in the heavier side

Take the heavier group and weigh 2 of those coins

If equal → the third coin is heavier

If not → heavier coin is found ✅

5. The Truth-Teller and the Liar

Ask either person:

“If I asked the other person which path leads to safety, what would they say?”

Then, take the opposite path.

Explanation:

A truth-teller tells you what the liar would say (wrong)

A liar lies about the truth-teller’s answer (also wrong)

So either way, the answer you get is the incorrect path — go the other way. ✅