The Japanese IQ Test

Supposedly this is given as a test in Japan. I have no idea if that’s accurate.

There are 8 people who have to cross the river on a raft.

1. Policeman
2. Thief
3. Father
4. Boy 1
5. Boy 2
6. Mother
7. Girl 1
8. Girl 2

The rules are:

Only two people can cross at a time.
Only the adults can operate the raft.
The father can’t be with the girls unless the mother is there.
The mother can’t be with the boys unless the father is there.
The thief can’t remain with anyone unless the policeman is present.

How do you get them all across?

Here’s how I did it in 17 steps. Can you do it faster? Let me know in the comments.

1. Policeman (P)
2. Thief (T)
3. Father (F)
4. Boy 1 (B1)
5. Boy 2 (B2)
6. Mother (M)
7. Girl 1 (G1)
8. Girl 2 (G2)

1. P, T →
2. ← P

3. P, B1 →
4. ← P T

5. F, B2 →
6. ← F

7. F, M →
8. ← M

9. P, T →
10. ← F

11. M, F →
12. ← M

13. M, G1 →
14. ← P T

15. P, G2 →
16. ← P

17. P, T →

Posted in Brain Teasers

Alive Without Breath

Alive without breath,
As cold as death,
Clad in mail never clinking,
Never thirsty, ever drinking

A fish.

Posted in Riddles

Around the House Without Touching It

What goes around and in the house, but never touches the house?

The sun.

Posted in Riddles

Sounds Nothing Like the Word

When pronounced, it sounds nothing like the word.

A sentence.

By Sef Daystrom

Posted in Riddles

So Simple I Only Point

I’m so simple I only point,
Yet I guide people all over the world.

What am I?

A compass.

Posted in Riddles
Tagged with

Two Common English Words

“H-e” starts and ends two common English words. One painful in love, one painful in everyday matters.

What are the two words?

Heartache and headache.

Posted in Riddles

What is the Five Digit Number?

What 5-digit number satisfies the following requirements?

1. No zeroes
2. First two digits are the same
3. Fourth digit is twice the first
4. Last digit is twice the third
5. Sum of all digits is 18

33264.

There are several ways of solving this. One way is to represent each spot with a letter, A – E.

Then you have these equations:

A = B
D = 2 * A
E = 2 * C
A + B + C + D + E = 18

By simplifying, you get:

4 * A + 3 * C = 18

Plug in values for A and C to find that A = 3 C = 2.

Posted in Brain Teasers

Soldiers Line Up Spaced With Pride

Soldiers line up, spaced with pride,
Two long rows lined side by side,
One sole unit can decide,
If the rows will unite or divide.

What am I?

A zipper.

Posted in Riddles
Tagged with

SO ND JF

SO, ND, JF, MA, __, __

What are the next two pairs of letters?

MJ, JA. September, October, November, December…

Posted in Brain Teasers

A Descending Nudge

A descending nudge,
Or a marvelous jibe,
An abode on excursion,
And a bashing immersion,
We all live in this tribe.

What am I?

Sports. A descending nudge is a touchdown (nudge = touch, descending = down), a marvelous jibe is a grand slam, an abode on excursion is a home run and a bashing immersion is a slam dunk. All of these phrases are found in sports, more specifically American football, baseball and basketball.

Posted in Riddles