Riddles and Brain Teasers

The problem works out to a set of three equations:
b + c + d = 22
a + c + e = 22
a + b + c + d + e = 30Solving for c = 14, leaving d = 8 – b and e = 8 – a. In other words, c must be 14, but the other two numbers just have to add up to 8. The requirement that they be unique rules out 4 + 4, so you’re left to choose from the following combations for b + d and a + e:
0 + 8
1 + 7
2 + 6
3 + 5

The problem works out to a set of three equations:
b + c + d = 22
a + c + e = 22
a + b + c + d + e = 30

Solving for c = 14, leaving d = 8 – b and e = 8 – a. In other words, c must be 14, but the other two numbers just have to add up to 8. The requirement that they be unique rules out 4 + 4, so you’re left to choose from the following combations for b + d and a + e:
0 + 8
1 + 7
2 + 6
3 + 5

Posted in Brain Teasers

5 25 325 4325

Given

1 = 5
2 = 25
3 = 325
4 = 4325

What does 5 equal?

Show the answer »

54325. Rather than being a mathematical solution, the answer is derived by prepending (putting in front of) the value on the left side of the equation with the previous answer. So for 3 you take 25, the previous answer, and put 3 in front, giving you 325. Then you put 4 in front to get 4325 and lastly, put 5 in front to get 54325.

Posted in Brain Teasers

Tagged with sequence

Round Like An Apple

Round like an apple, deep like a cup,
yet all the king’s horses cannot pull it up.

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A well.

Posted in Riddles

I Can Always Go Up, Never Down

I can always go up, never down,
I can always turn left, never right,
I am always hot when I’m cold

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A ski lift.

Posted in Riddles

Rhyming Anagrams

There are four pairs of words below. Rearrange one of the words in the pair to form a word that rhymes with the other word. For example, if you had the following pair of words:

FRINGE LINGER

You would rearrange FRINGE into FINGER, which rhymes with LINGER. You can rearrange the letters of either word.

1. MOPIER PERIOD
2. GHOULS SCRUFF
3. JAILED LEVIED
4. WEIGHT ARTIST

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1. DOPIER
2. SLOUGH
3. VEILED
4. STRAIT

Posted in Brain Teasers

The Most Impressive Boundary

The most impressive boundary’s not a wall.
It’s not a manufactured thing at all.
Moving towards it won’t reduce the gap
and nothing marks its presence on a map.

Show the answer »

The horizon.

By Sef Daystrom

Posted in Riddles

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