Brain Teasers
The Hardware Store
A man goes into a hardware store to purchase some knobs. To purchase one knob you must pay a minimum of 4 U.S. coins. Two knobs can be purchased with a minimum of 6 U.S. coins. 3 knobs require a minimum of 2 U.S. coins. How much does one knob cost?
U.S Coins include: a penny ($.01), a nickel ($.05), a dime ($.10), a quarter ($.25), a half-dollar ($.50), and a silver dollar ($1.00).
U.S Coins include: a penny ($.01), a nickel ($.05), a dime ($.10), a quarter ($.25), a half-dollar ($.50), and a silver dollar ($1.00).
Hint
Three knobs cannot be purchased with $0.50.Answer
One knob costs $0.17Hide Hint Show Hint Hide Answer Show Answer
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