• ## The Perfect Counterfeit Bills

A man can make perfect counterfeit bills. They look exactly like real ones, they\’re made of exactly the same materials, made the same way, everything. So perfect, one could pretty much call them real bills.

One day he successfully makes a perfect copy of another bill.

However, he gets caught when he tries to use the copy. How is this possible?

Spoiler

He made a perfect copy of a counterfeit bill. š

• ## 4 Gallons of Water

You have two buckets, one holds exactly 5 gallons and the other 3 gallons.

How can you measure 4 gallons of water into the 5 gallon bucket?

(Assuming you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

Spoiler

• Fill up the 5 gallon bucket.
• Pour it into 3 gallon bucket, leaving 2 gallons.
• Empty out the 3 gallon bucket.
• Pour the 2 gallons in the 5 gallon bucket into the 3 gallon bucket.
• Fill up the 5 gallon bucket and pour it into the 3 gallon bucket until it\’s full, leaving 4 gallons in the 5 gallon bucket.

• ## The Two Ropes And The Lighter

You have a lighter and two ropes that take exactly one hour to burn, but they don\’t burn at a steady rate. For example, one rope could take 59 minutes to burn the first inch and then burn the rest of the rope in the last minute.

How would you use these two ropesĀ to measure 45 minutes?

Spoiler

Light the first ropeĀ on both ends and the second ropeĀ at only one end. When the first ropeĀ burns out you know 30 minutes have passed. Light the other end of the second ropeĀ and when it burns out, 45 minutes have passed.

• ## The Six Rungs Ladder

A boat has a ladder that has six rungs. Each rung is one foot apart. The bottom rung is one foot from the water. The tide rises at 12 inches every 15 minutes. High tide peaks in one hour.

When the tide is at its highest, how many rungs are under water?

Spoiler

None. The boat is floating on the water, so as the tide rises, so does the ladder.

• ## The Two Women

Two women apply for a job. They are identical and have the same mother, father and birthday. The interviewer asks, \”Are you twins?\” to which they honestly reply, \”No\”.

How is this possible?

Spoiler

They are triplets.