To make $1.77 using 21 coins, you can combine different denominations of coins. For example, you could use 7 dimes (70 cents), 5 nickels (25 cents), and 9 pennies (9 cents), which totals $1.77 and uses exactly 21 coins. Adjust the number of each type of coin as needed to find other combinations that also meet the criteria.
21 pennies
I'd say you can't. If all the coins are the smallest possible without pennies, they must all be nickels, and 21 of them make $1.05 . So in order for 21 coins to be not more than $1.00, there must be some pennies.
3 dimes 13 nickles 5 pennies
(1) $0.50 (2) $0.10 (3) $0.05 (15) $0.01
Assuming that you are only using current US coins (5, 10, 25 and 50 cents), the answer is 21. NickelsDimesQuartersHalves1500013100112009300740055003600170010010811062104310241005105020312012205001310112010011
21 pennies
I'd say you can't. If all the coins are the smallest possible without pennies, they must all be nickels, and 21 of them make $1.05 . So in order for 21 coins to be not more than $1.00, there must be some pennies.
You cant unless you have 100 pennies.
The Tonight Show with Jay Leno - 1992 21-177 was released on: USA: 10 July 2013
21 ways
How about: 1*3*59 = 177
Wheel of Fortune - 1983 San Francisco 2 21-177 was released on: USA: 11 May 2004
In the game 21 Questions, coins are used to reveal who answered questions about you. There are two ways that you can collect coins: by playing the game or purchasing them.
Wheel of Fortune - 1983 13-177 was released on: USA: 21 May 1996
3 dimes 13 nickles 5 pennies
Skip Beat chapter 177 (volume 27) has already been out since the date Aug 21, 2011.
If it is composite, you can not make a number prime.