This is ! jerome bought 2 postcards and received $1.35 in change in quarters and dimes. if he. got 6 coins back, how many of each coin did he get?

He got 5 quarters and 1 dime back

Work: (5x0.25) +0.10

Ok, so we can trial and error
we got quarters, nickles, dimes, pennies,
let's try to max out each one
if we got 5 quarters, then we would have 1 coin left to be a dime to get 1.35
wow, I just guessed

ok, so if we got 4 quarters, then we need 35 cents more with 2 coins, we can't do that because max we can do is 20 cents (2 dimes)

if we got 3 quarers, then we need 60 cents with 3 coins, also impossible since the max we can get with remaining coins is 30 cents (3 dimes)

if we got 2 then we need even more

answer is 5 quarters and 1 dime