Mex has $2.65. He has only dimes and quarters. If Mex has more quarters than dimes, how many coins does he have in total?

Guest Jun 13, 2020

#1**+1 **

maybe just do trial and error

that's what i usually do when i can't figure it out

amazingxin777 Jun 13, 2020

#2**+1 **

We set up an equation first: 0.25q + 0.10d = 2.65

Multiplying by 100 and dividing by 5, we get 5q + 2d = 53

At this point, we can just use trial and error, noting that q can only be an odd number because when it's even, 3-0 = 3, which is not divisible by 2.

After testing out a few cases, the only pair that satisfies q > d is q=9 and d=4.

thelizzybeth Jun 13, 2020