Question

Math Quiz:
A country currency consists of the following coins 1¢, 2¢, 5¢, 10¢, 25¢, 50¢. What is the most money you can have in coins and not be able to pay exactly $1?

It can be over a dollar

Answer 1

Coin change problem.

Answer 2

i guess you could have 99 1¢ pieces

Answer 3

This doesn't seem well-posed.

Answer 4

It can be over a dollar

Answer 5

Then.. There is no limit on what you can pay.

Answer 6

Or perhaps I am not understanding correctly. You can have \(100\) 1 cent pieces, \(1000\) 1 cent pieces, \(10,000\) 1 cent pieces etc.

Answer 7

one 50¢ and three 20¢ maybe

Answer 8

OH. I completely misread the sentence. My bad, yo.

Answer 9

ohhh pop quiz *_*

Answer 10

you can't hv 2 50's, 4 25's, 1 50's and 2 25's, 1 50's and 5 10's, 1 50 and 20 5's and so on....

Answer 11

oh there are no 20¢ s only 25¢

Answer 12

3×25¢ and 3×10¢ =$1.05

Answer 13

*+4¢

Answer 14

$1.09

Answer 15

ans. is 124 cents?

Answer 16

@UnkleRhaukus nope :) , Hint: its greater than that

Answer 17

50, 25, {10,10,10,10,10,10,10,10,10}, 5, {2,2}
?

Answer 18

oops, nope.

Answer 19

First at most 1 50 cents, since 2 50 cents coins = $1 => $0.5
Then, at most 1 25 cents coin , since 2 25 cents coins = $0.5 => + 0.5 above = 1 (=> rejected)
Now, we've got $0.75
We can at most 4 $0.1 coins. since 5 x $ 0.1 = $ 0.5 + 0.5 above = $1 (=> rejected)
Now, we have $ 0.75 + $ 0.4 = 1.15
We CAN'T have $0.05 coin, since it 0.05 + 0.75 = 0.8 + 0.2 = 1 (=> rejected)
we can have at most 4$0.02 coins, since 5x^0.02 = $0.1 and 0.1+ 0.4 = 0.5 (rejected)
Now we have 1.23
No 0.01 ...
1.23?

Answer 20

@RolyPoly is correct :D

Answer 21

Yay!!!~

Answer 22

50,25, 10, 10,10,10,2,2,2,2? oops 123

Answer 23

*No 0.01 since 0.01 + 0.02 + 0.02 = 0.05, that is similar to 0.05 case (=> rejected)

Answer 24

Thanks for the nice problem, .Sam.

Answer 25

np :)

Answer 26

typo:
we can have at most 4$0.02 coins, since 5 x 0.02 = $0.1 and 0.1+ 0.4 = 0.5 (rejected)