Assuming that you are only using current US coins (5, 10, 25 and 50 cents), the answer is 21. NickelsDimesQuartersHalves1500013100112009300740055003600170010010811062104310241005105020312012205001310112010011
How do you get 67 cents wit 5 coins
The answer will depend on which country's currency the question is about.
The smallest coin available is a penny, worth one cent. Simply shift the decimal two places to the right (because you're going from dollars and cents to strictly cents) to find that you would need 2930 pennies to make $29.30 using the largest number of coins possible. Using any other coins would only decrease the number of coins in the combination.
There is no straightforward answer, you can make it with 50 or 45 coins quite easily if you use 50 one-cent coins or 49 one-cent coins and a 5-cent coin. You could bend the meaning of the question using non-US currencies, or by trading, etc.
51
Assuming that you are only using current US coins (5, 10, 25 and 50 cents), the answer is 21. NickelsDimesQuartersHalves1500013100112009300740055003600170010010811062104310241005105020312012205001310112010011
How do you get 67 cents wit 5 coins
You can make 43 US cents using three dimes, two nickels, and three cents. (3 x 10) + (2 x 5) + (3 x 1) = 43
25 cents plus 5 cents = 30 cents. One of these coins is not a nickel.
To make 89 cents with 6 coins, you have to first realize that the "9" part of the cents is comprised of 5 cents and 4 pennies. Therefore, you have to have 4 pennies and 85 cents using 2 coins; impossible, since you would need 3 coins(if you had half-dollars) to make that amount: a half-dollar, quarter, and a dime. Basically, it's impossible with only coins worth 0.01, 0.05, 0.10, 0.25, and 0.50 of the currency(US$, I assume?)
Two quarters Three nickels Three pennies
The answer will depend on which country's currency the question is about.
quarter, dime, penny. (It only works with US coins.)
The smallest coin available is a penny, worth one cent. Simply shift the decimal two places to the right (because you're going from dollars and cents to strictly cents) to find that you would need 2930 pennies to make $29.30 using the largest number of coins possible. Using any other coins would only decrease the number of coins in the combination.
Three quarters, two dimes, one penny.
3 dimes 1 nickel and 3 pennies