## Brain Teasers

1)How can you add eight 8's to get the number 1,000? (only use addition)

2) Two Fathers and Two Sons Riddle

Two fathers and two sons sat down to eat eggs for breakfast. They ate exactly

three eggs, each person had an egg. The riddle is for you to explain how

3) Digit Frequency

Part I. What digit is the most frequent between the

numbers 1 and 1,000 (inclusive)?

To solve this riddle you don't want to

manually do all of the math but rather try to figure out a pattern.

4) Three Guys at A Hotel Riddle

Three guys rent a hotel room for the

night. When they get to the hotel they pay the $30 fee, then go up to their

room. Soon the bellhop brings up their bags and gives the lawyers back $5

because the hotel was having a special discount that weekend. So the three

lawyers decide to each keep one of the $5 dollars and to give the bellhop a $2

tip. However, when they sat down to tally up their expenses for the weekend the

could not explain the following details:

Each one of them had originally

paid $10 (towards the initial $30), then each got back $1 which meant that they

each paid $9. Then they gave the bellhop a $2 tip. HOWEVER, 3 • $9 + $2 =

$29 The guys couldn't figure out what happened to the other dollar. After

all, the three paid out $30 but could only account for $29. Can you determine

what happened?

5) The Merchant

A merchant can place 8 large boxes or 10 small boxes into

a carton for shipping. In one shipment, he sent a total of 96 boxes. If there

are more large boxes than small boxes, how many cartons did he ship?

6) Three Brothers on a Farm

Three brothers live in a farm. They agreed to

buy new seeds: Adam and Ben would go and Charlie stayed to protect fields. Ben

bought 75 sacks of wheat in the market whereas Adam bought 45 sacks. At home,

they split the sacks equally. Charlie had paid 1400 dollars for the wheat. How

much dollars did Ben and Adam get of the sum, considering equal split of the

sacks?

7) The Insurance Salesman

An insurance salesman walk up to house and

knocks on the door. A woman answers, and he asks her how many children she has

and how old they are. She says I will give you a hint. If you multiply the 3

children's ages, you get 36. He says this is not enough information. So she

gives a him 2nd hint. If you add up the children's ages, the sum is the number

on the house next door. He goes next door and looks at the house number and says

this is still not enough information. So she says she'll give him one last hint

which is that her oldest of the 3 plays piano.