Was offline since I posted the A+B+C riddle. Glad to see the commotion it caused!
I actually solved it 3 diff ways, all getting to same answer. Come on, Extra Credit, You can do it!
This method involved more common sense and less algebra:
Hidden:
If A+B=3 hours, then they do 1/3 in an hour.
then B+C= 1/4 in an hour.
And A+C= 1/6 in an hour.
If you add 1/3 + 1/4+ 1/6 = 3/4 in an hour. But since we counted everyone's input twice here (a+b+b+c+a+c), that means in one hour they can accomplish exactly half of 3/4, which is 3/8.
Then solve: If 3/8th of the job =60 minutes, then whole job (1) = ? minutes
Answer: 160 min or 2 hr 40 min
A customer in a shoe store bought a pair of shoes that were on sale for $15.00. He gave the salesman a $20.00 bill. Since he did not have change, the salesman went to an adjoining store and asked the lady in charge to give him change. She obligingly gave him a $10.00 bill and two $5.00 bills. The shoe man then returned and gave the customer his shoes and $5.00 change. The customer left.
After the customer left, the lady who gave the salesman the change came into the store and told him that the $20.00 bill was a counterfeit. He looked at the bill, agreed that it was indeed worthless, and immediately repaid her with a good $20.00 bill.
That night, as he was closing the store, the shoe man began thinking about what he had lost in this series of transactions.
Was offline since I posted the A+B+C riddle. Glad to see the commotion it caused!
I actually solved it 3 diff ways, all getting to same answer. Come on, Extra Credit, You can do it!
This method involved more common sense and less algebra:
Hidden:
If A+B=3 hours, then they do 1/3 in an hour.
then B+C= 1/4 in an hour.
And A+C= 1/6 in an hour.
If you add 1/3 + 1/4+ 1/6 = 3/4 in an hour. But since we counted everyone's input twice here (a+b+b+c+a+c), that means in one hour they can accomplish exactly half of 3/4, which is 3/8.
Then solve: If 3/8th of the job =60 minutes, then whole job (1) = ? minutes
Answer: 160 min or 2 hr 40 min
This reached my mental capacity for today. Let’s see the next one.
A customer in a shoe store bought a pair of shoes that were on sale for $15.00. He gave the salesman a $20.00 bill. Since he did not have change, the salesman went to an adjoining store and asked the lady in charge to give him change. She obligingly gave him a $10.00 bill and two $5.00 bills. The shoe man then returned and gave the customer his shoes and $5.00 change. The customer left.
After the customer left, the lady who gave the salesman the change came into the store and told him that the $20.00 bill was a counterfeit. He looked at the bill, agreed that it was indeed worthless, and immediately repaid her with a good $20.00 bill.
That night, as he was closing the store, the shoe man began thinking about what he had lost in this series of transactions.
What did he lose?
Hidden:
20$. The 15$ worth of shoes plus the 5$ change he gave.
If this is wrong then I need a break from this thread. And a good nap,
A customer in a shoe store bought a pair of shoes that were on sale for $15.00. He gave the salesman a $20.00 bill. Since he did not have change, the salesman went to an adjoining store and asked the lady in charge to give him change. She obligingly gave him a $10.00 bill and two $5.00 bills. The shoe man then returned and gave the customer his shoes and $5.00 change. The customer left.
After the customer left, the lady who gave the salesman the change came into the store and told him that the $20.00 bill was a counterfeit. He looked at the bill, agreed that it was indeed worthless, and immediately repaid her with a good $20.00 bill.
That night, as he was closing the store, the shoe man began thinking about what he had lost in this series of transactions.
