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There are at least two different ways:

2 quarters

3 dimes

1 nickel

15 pennies

21 total

1 quarter

3 dimes

7 nickels

10 pennies

21 total

The system is to go through and make a systematic list now go to the maximum amount of dimes you may find more answers.

Q: How do you make change for a dollar using 21 coins?

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This question makes no sense. You could have an infinite amount of coins and make change for a dollar. For example, you could have 100 pennies, or 1,000,000 pennies, or 1,000,000,000 pennies and make change for a dollar.

40 pennies 8 nickles 2 dimes

Assuming she is using current US coins, she has 4 pennies, 4 dimes, 1 quarter and 1 half dollar - 10 coins for a total of $1.19. She could, of course, also have any number of dollar coins as well.

Assuming he is using current US coins, she has 4 pennies, 4 dimes, 1 quarter and 1 half dollar - 10 coins for a total of $1.19. He could, of course, also have any number of dollar coins as well.

A 50 cent piece, a quarter and 5 nickels.

Related questions

There are 293 ways to make change for a dollar using the coins of a penny thru 1/2 dollar

A half dollar and five pennies

nine

One half dollar, one quarter, four dimes and four pennies. It equals $1.19. You can not make change for exactly one dollar with those coins

half dollar, quarter four dimes

This question makes no sense. You could have an infinite amount of coins and make change for a dollar. For example, you could have 100 pennies, or 1,000,000 pennies, or 1,000,000,000 pennies and make change for a dollar.

One quarter, two dimes, two nickels, forty-five pennies.

40 pennies 8 nickles 2 dimes

Assuming she is using current US coins, she has 4 pennies, 4 dimes, 1 quarter and 1 half dollar - 10 coins for a total of $1.19. She could, of course, also have any number of dollar coins as well.

Assuming he is using current US coins, she has 4 pennies, 4 dimes, 1 quarter and 1 half dollar - 10 coins for a total of $1.19. He could, of course, also have any number of dollar coins as well.

10 nickels and 2 quarters

3 dollar 3 coins