Four Weights To Thirty

What four weights can be used to balance from one to thirty pounds?

A = 1
B = 3
C = 9
D = 17

1 lb = A
2 lbs + A = B
3 lbs = B
4 lbs = A + B
5 lbs + A + B = C
6 lbs + B = C
7 lbs + B = A + C
8 lbs + A = C
9 lbs = C
10 lbs = A + C
11 lbs + A = B + C
12 lbs = B + C
13 lbs = A + B + C
14 lbs + B = D
15 lbs + B = A + D
16 lbs + A = D
17 lbs = D
18 lbs = A + D
19 lbs + A = B + D
20 lbs = B + D
21 lbs = A + B + D
22 lbs + A + B = C + D
23 lbs + B = C + D
24 lbs + B = A + C + D
25 lbs + A = C + D
26 lbs = C + D
27 lbs = A + C + D
28 lbs + A = B + C + D
29 lbs = B + C + D
30 lbs = A + B + C + D

Posted in Brain Teasers

777, 888 and 999

You are given the numbers 777, 888 and 999. Using the numbers once and adding, subtracting, multiplying or dividing, how can you make 999?

(7 x 7 x 7) + (9 x 9 x 8) + ((9 – 8) x 8) = 999
(77 + 7) + 888 + (9 + 9 + 9) = 999

If other operators were allowed, another solution would be 999 modulo (888 x 777). I’m sure there are more solutions.

Posted in Brain Teasers

Placed On the Table But Never Eaten

What is placed on the table, cut and passed but never eaten?

A deck of cards. You play card games on a table, cut the deck, then deal (or pass out) the cards, but you only eat the snacks.

Posted in Riddles

Round, Yet Flat As a Board

Round she is, yet flat as a board
Altar of the Lupine Lords.
Jewel on black velvet, pearl in the sea
Unchanged but ever changing, eternally.

The moon.

Posted in Riddles

Pushing Car Past Hotel Lands You in Jail

A man pushes his car by a hotel and gets sent to jail. Why?

The man is playing monopoly, and landed on the Go To Jail space. An alternative version of this is, “A man stops his car in front of a hotel and immediately knows he is bankrupt.” The answer is the same, that he’s playing Monopoly, but this time he landed on a space with a hotel and didn’t have enough money to pay the bill.

Posted in Brain Teasers

Alphonso and Sadie

Alphonso and his sister Sadie are entering the airport to meet their mother when Sadie gasps in surprise and says to her brother, “You see that man in the crowd over there?”

Alphonso replies, “It’s Bernie. I don’t believe it. Let’s go introduce ourselves.”

Neither of them had ever met Bernie before. They’d never seen a picture or painting of him, nor was he a famous celebrity.

How was this possible?

Alphonso was born as a twin, but he was separated from his twin brother at birth. Bernie is Alphonso’s identical twin, which is how Sadie was able to recognize him in the crowd.

This is kind of a cheat, because there are probably other possible explanations. But we can’t have everything :)

Posted in Brain Teasers

Willow’s Broken Keyboard

Willow’s keyboard is acting up. The a, e, i, o and u keys don’t work and the space key is misbehaving as well. Can you decipher these common sayings they typed?

tfsghttfmnd
ctnsspkldrthnwrds
hnstysthbstplcy
sycmsyg

Out of sight, out of mind
Actions speak louder than words
Honesty is the best policy
Easy come, easy go

Posted in Brain Teasers

Five Three Two

What is the answer to the last equation?

5 3 2 = 151012
9 2 4 = 183662
8 6 3 = 482466
5 4 5 = 202504
7 2 5 = ?

10000 × (x × y) + 100 × (x × z) + transpose_digits(x × y + y × z)

transpose_digits() just swaps the digits

Posted in Brain Teasers

Far Blow Bacon

What do the following words have in common?

far
blow
bacon
lather
fasting
wariness
pacemaker

Each of these words becomes a new word when the letter ‘e’ is placed after the first letter.

far = fear
blow = below
bacon = beacon
lather = leather
fasting = feasting
wariness = weariness
pacemaker = peacemaker

Posted in Brain Teasers

Never Ahead, Ever Behind

Never ahead, ever behind,
Yet flying swiftly past;
For a child I last forever,
For adults I’m gone too fast.

What am I?

Childhood.

Posted in Riddles
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