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Which 5 coins would you need to make 3.90?
$2, $1, 50c, 20c, 20c.
Ann has 20 coins in her purse They are 10c 20c and 50c coins and the total value of the coins is 5 dollars If she has more 50c than 10c coins- how many 10c coins does she have?
Well, isn't that a happy little math problem we have here! If Ann has more 50c coins than 10c coins and the total value is $5, we can figure out that she must have 4 10c coins. Let's give Ann a little encouragement as she counts her coins and solves this puzzle.
What is the largest possible value of coins is it possible to have without having any coins which will add to 4 dollars coins are 5c 10c 20c 50c 1 dollar 2 dollar?
Tentatively I will say $4.35, with for instance: 19 x 20c 1 x 50c 1 x 5c It's possible that a rigorous method exists, but this is just a fudged guess. Any advances on it?
Can you make 74 cents with 7 coins?
Indeed. 74 cents can be made with the following set of 7 coins: 50c 10c 10c 1c 1c 1c 1c
A piggy bank has only nickels and dimes in it there are 14 coins worth 0.95. How many nickels and dimes are in the bank?
2 variables with 2 equations. A simultaneous equation problem. d+ n = 14 10d + 5n = 95 Multiply the first equation by -5 -5d + -5n = -70 10d + 5n = 95 add together 5d = 25 d = 5 ◄ plug that in the first equation to find n 5 + n = 14 n = 9 ◄ check 5 dimes plus 9 nickles is 50c+45c=95c ■
