Flour Selling puzzle
You are selling White Flour and have two measuring cups.
Cup A of Flour Costs $30,
Cup B of Flour Costs $50
If buyer want to buy Flour costing $70 , How will you measure? 
- Grab two A cupfuls, put them aside.
- Grab a third and pour it all into B.
- Grab a fourth and pour into B as much as it can hold.
- Put the remaining flour inside A aside and you now have $70 worth.
Fill a cup of 50$ full, keeping 30$ cup empty. Now put flour from 50$ cup to 30$ cup till 30$ cup gets full. PAck this for the user, and again fill the 50$ cup and pack. You have given him flour worth 70$
Solution provided by Ekta27 has a slight error* (indicated below) but is the easier one (less number of steps) compared to the answer marked ‘Best’:
Splitting the process into individual steps:
The “Best Answer”:
1. Fill Cup A.
2. Keep aside. (For customer)
3. Fill Cup A again.
3. Keep aside (For customer)
4. Fill A again
5. Pour into B
6. Fill A again
7. Pour into B till B is full.
8. Pour remaining flour from A for customer.
Ekta’s answer (corrected):
1. Fill cup B.
2. Pour from cup B into cup A till A is full.
(* The sentence “Pack this for customer” after step 2 seems to imply that the qty filled in ‘A’ is to be packed, which is wrong.)
3. Keep aside (For customer)
4. Fill Cup B again.
5. Pack the contents of B for customer (along with the qty kept aside in step 3)
Your Answer
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