<p>Roberto has 12 coins totalling 1.45. None of his coins is larger than a quarter. Which of the following cannot be the number of quaters he has?
a) 1
b)2
c) 3
D) 4
e) 5
Please provide explain too por favor</p>
<p>The answer is (A) because if only one coin is a quarter, the remaining $1.20 must be made up by 11 coins. A dime is the highest value coin below a quarter, and it would take 12 dimes to reach $1.20.</p>
<p>However, if one uses 12 dimes and one quarter, the total number of coins used is 13.</p>
<p>What about 3/ 4/5 ?</p>
<p>One knows that a combination is possible for all other answers because (A) does not work.</p>