Thread: Brain Teasers

Originally Posted by Frixxxx

Copper, Iron, Tin

Say Frixxxx, you sat at that table full of goodies hey? You are CORRECT!!......... Almost userque, you were at the table also.

Frixxxx wins.

Originally Posted by konakathy

you are missing an E.

What am I missing? Where's the other E? I was going to post the same as userque.

OK! Duh! We didn't need to utilize all 13 letters..."must come from".

You're such a brain tease, TR!

What's the next letter in this sequence? A,D,A,E,I,B,?

When Is Cheryl’s Birthday?


Albert and Bernard just met Cheryl. “When’s your birthday?” Albert asked Cheryl.

Cheryl thought a second and said, “I’m not going to tell you, but I’ll give you some clues.” She wrote down a list of 10 dates:
May 15, May 16, May 19
June 17, June 18
July 14, July 16
August 14, August 15, August 17
“My birthday is one of these,” she said.
Then Cheryl whispered in Albert’s ear the month — and only the month — of her birthday. To Bernard, she whispered the day, and only the day.

“Can you figure it out now?” she asked Albert.
Albert: I don’t know when your birthday is, but I know Bernard doesn’t know, either.
Bernard: I didn’t know originally, but now I do.
Albert: Well, now I know, too!
When is Cheryl’s birthday?

Originally, Mr. Kong said this was a problem inflicted on fifth-graders, leading to hand-wringing that Singapore children were way better at math than everyone else in the world and worries that Singapore children were being mentally abused with convoluted logic at a young age.
It turned out the problem actually came from a math olympiad test for math-savvy high school-age students.
How would you fare in a room full of adolescent math competitors in Singapore?
(Once you think you have figured it out — or if you don’t know where to start — here is the answer and an explanation.)

Originally Posted by userque

What's the next letter in this sequence? A,D,A,E,I,B,?

G ?

Originally Posted by konakathy

G ?

Smart guess, but not G.

Originally Posted by userque

Smart guess, but not G.

F ? Was I off one count?

Dang! I have to go back to work and read addresses. My brain is numb.

Originally Posted by konakathy

F ? Was I off one count?

Dang! I have to go back to work and read addresses. My brain is numb.

"F" is correct! Can you explain why "F" is correct?

Originally Posted by userque

"F" is correct! Can you explain why "F" is correct?

Yes, but only in my convoluted way of thinking. It was a 4/5 count.

A-D (4) back to A..A-E (5) E-I (4) start at B ... B-F (5) It might not be the correct way to figure it out, but it's my pea brain way.

Originally Posted by konakathy

Yes, but only in my convoluted way of thinking. It was a 4/5 count.

A-D (4) back to A..A-E (5) E-I (4) start at B ... B-F (5) It might not be the correct way to figure it out, but it's my pea brain way.

LOL...interesting. I figured you did it some "other" type of way. The intended solution:

pi to 10,000 digits
Pi~3.1415926

c.adaeibF

Where a=1, b=2, c=3, etc.


The letters in question correspond to the fractional part of Pi. "F" corresponds to "6." I left out "3" or "c" (the non-fractional part of pi) to help make this teaser "google proof."

Well done!

_____________
Use strong encryption, btw.