For bringing each copper coin from the bottom of a river, a coin-diver gets 20 cents, and for each brass coin she gets 25 cents. If after one dive, she got $3.40. What is the minimum number of copper coins that she brought?
A
4
B
3
C
2
D
1
E
0
Correct answer: C
Explanation
Let's subtract $0.20 until we find a multiple of $0.25.
$3.40 - $0.20*2 = $3.00, which is a multiple of $0.25.
Source: Algebra word problems from the AQuA-RAT dataset (Ling et al., 2017), published by Google DeepMind under the Apache License 2.0.
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AQuA-RAT items are crowdsourced algebra problems, not ACT questions. They carry five answer choices in the pre-2025 ACT Mathematics style and no ACT reporting category. Useful for drilling Preparing for Higher Math content; not a substitute for a real form.
id aqua_rat:88bdaed2a74440bff1411d892ac36010
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