I've always hated these questions. Luckily for you, it's not too complicated. Count them out. For complicated questions, there is a complicated (but less time-taking) method to find it (I can't remember it - it's too complicated).
Q - quarter
D - dime
N - nickel
P - penny
Q
DDN
DDPPPPP
DNNN
DNNPPPPP
DNPPPPPPPPPP
DPPPPPPPPPPPPPPP
NNNNN
NNNNPPPPP
NNNPPPPPPPPPP
NNPPPPPPPPPPPPPPP
NPPPPPPPPPPPPPPPPPPPP
PPPPPPPPPPPPPPPPPPPPPPPPP
13 ways
Two quarters Three nickels Three pennies
5 quarters 4 quarters 2 dimes and a nickel 10 dimes and 5 nickels
5 ways 6 dimes 1 dime, 4 nickels 2 dimes, 2 nickels 6 nickels 1 quarter, 1 nickel
45X1X5X10 = 2250 ways to make 45 cents using pennies nickels and dimes.
Four.
None. If you "get 65 cents using only dimes nickels and quarters" you are not using any pennies!
There are 2 solutions (if you include the non-use of quarters): 1 Quarter, 2 Dimes, 2 Nickels, 45 Pennies No Quarters, 2 Dimes, 8 Nickels, 40 Pennies
Two quarters Three nickels Three pennies
13
19
50 different ways
30 dimes ,50 half dollars and 20 pennies
5 quarters 4 quarters 2 dimes and a nickel 10 dimes and 5 nickels
5 ways 6 dimes 1 dime, 4 nickels 2 dimes, 2 nickels 6 nickels 1 quarter, 1 nickel
5 dimes,6 nickles.8 dimes
1 quarter-1 dime-1 nickel 1 quarter-1 dime-5 pennies 1 quarter-3 nickels 1 quarter 2 nickels-5 pennies 1 quarter-1 nickel-10 pennies 1 quarter-15 pennies 4 dimes 3 dimes-2 nickels 3 dimes-1 nickel-5 pennies 3 dimes- 10 pennies 2 dimes-4 nickels 2 dimes-3 nickels-5 pennies 2 dimes-2 nickels-10 pennies 2 dimes-1 nickel-15 pennies 2 dimes-20 pennies 1 dime-6 nickels 1 dime-5 nickels-5 pennies 1 dime-4 nickels- 10 pennies 1 dime-3 nickels-15 pennies 1 dime-2 nickels-20 pennies 1 dime-1 nickel-25 pennies 1 dime-30 pennies 8 nickels 7 nickels-5 pennies 6 nickels-10 pennies 5 nickels-15 pennies 4 nickels-20 pennies 3 nickels-25 pennies 2 nickels-30 pennies 1 nickel-35 pennies 40 pennies Total Number of Solutions=31
2 quarters, 3 dimes, 3 nickels and 5 pennies