Logic Q

[Kool]

Originally posted by Amina-DZ

Originally posted by Kool
Thanx for the welcome Amina. where do u live by the way ?

I'm in the UK.

Me too, am in bloody london.

[Amina-DZ]

Originally posted by Kool
I don't have an explanation for it but i'm sure you do.

I might do but I want to make others think

[Kool]

Amina, am unable to think as of now due to the fact that i haven't had lunch already !

[Amina-DZ]

You mean dinner??

[Jannah]

Maybe he hasn't had lunch or dinner

Saha Kool

[phylay]

Originally posted by Amina-DZ
If you live in the UK (number should be in the abc-defg format), give this one a shot

1. Grab a calculator.
2. Key in the first three digits of your phone number (NOT the area code)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last 4 digits of your phone number
7. Add the last 4 digits of your phone number again.
8. Subtract 250
9. Divide number by 2

Do you recognise the answer?

How do you explain it?

5000*(3firstdigits) + (4lastdigits)
anyone with a uk phone number to help me go ahead?

[phylay]

Originally posted by Amina-DZ
I think I can do it in 5 weighings!

5 is the correct answer. Well done!
Let's make it harder:

You have 12 coins, six weigh 24 grams and six weigh 25 grams. You also have the broken scale from Five Weights and a Broken Scale.
Sort the 12 coins into the group of 24g coins and the group of 25g coins using that broken scale no more than 9 times.