Bottle and a cork
Algebra
Level
2
If a bottle and a cork cost a dollar and a dime, and a bottle costs a dollar more than the cork, how many cents is the cork?
The answer is 5.
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1 solution
Bottle cost = 100 cents + cork cost
110 = bottle cost + cork cost
110 = 100 cents + 2 * cork cost
cork cost = (110 - 10) cents / 2 = 10 cents / 2 = 5 cents