C. add 3 to 15 because the sequence is +3 every time
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Answer:</h2><h2>40 minutes</h2>
Step-by-step explanation:

Well, you could have 2 numbers to get 25 but it is impossible to get 8 unless you divided by a random number
The answer is 7. So you would do
2(3)2=12
4(3)=12
12-12=0
0+7
7