Many people were worried when they found that their photocopiers had been sometimes changing numbers on one photocopy; sometimes, although not always, changed 6 into 8.A list of prices was copied on this photocopier. The first five prices on the copy are shown below.$54.80$60.00$65.40$70.80$78.20In the original list, the prices had increased by the same amount each time.What was the next price on the original list?
Correct answer: B. $81.60
- A. $81.80
- B. $81.60
- C. $83.60
- D. $85.60
Explanation
The correct answer is $81.60. The original list of prices increases by $2.80 each time. Therefore, after $78.20, the next price would be $81.60. The other options do not align with the consistent pattern of price increases observed in the question.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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