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91Ó°ÊÓ

Identify a pattern in each list of numbers. Then use this pattern to find the next number. (More than one pattern might exist, so it is possible that there is more than one correct answer.) \(3,7,12,18,25,33\)

Short Answer

Expert verified
The next number in the sequence \(3,7,12,18,25,33\) will be 42.

Step by step solution

01

Observe the Sequence

First, carefully read through the sequence of numbers (3,7,12,18,25,33) and try to see a pattern. Just by quickly glancing, it is not very obvious what the pattern might be.
02

Compute Differences

Now, calculate the difference between each successive number. To do that, subtract the previous number from the next number: \(7-3 = 4\), \(12-7 = 5\), \(18-12 = 6\), \(25-18 = 7\) and \(33-25 = 8\). The pattern that starts to emerge here is of increasing differences which support an arithmetic progression.
03

Identify the Pattern

So we observe that each successive difference increases by 1. This is the pattern. From this, we can predict the next difference in the series.
04

Predict the Next Number

The next difference, based on our identified pattern, will be 9. Adding this 9 to the last number in the series (33), we get \(33 + 9 = 42\). So, the next number in the series will be 42.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Patterns in Numbers
When looking at a sequence of numbers, our first task is to identify any patterns that might exist. Patterns are rules or formulas that help us understand how numbers in a sequence are related. Spotting these patterns can be like solving a puzzle, where each number fits into the sequence for a reason.

There are many ways patterns can be reflected in a number sequence. For instance, each number may increase or decrease by the same amount, double, or follow complex mathematical operations. In our exercise's sequence (3, 7, 12, 18, 25, 33), initially, it may seem tricky to identify the pattern at a quick glance. But, with a systematic approach like determining the differences between successive numbers, patterns often become clearer.
  • By subtracting each number from the next, you can create a new sequence of differences.
  • The difference sequence can help reveal the underlying pattern.
  • Noticing regularities in these differences can guide you toward understanding the original sequence’s behavior.
Detecting these patterns can turn a confusing cluster of numbers into an understandable sequence.
Arithmetic Progression
An arithmetic progression is a type of number pattern where the difference between consecutive terms is constant. This is a common and straightforward pattern found in many number sequences. In an arithmetic sequence, you add the same value repeatedly to get from one term to the next.

In some cases, you'll notice patterns like increasing differences between terms, which can resemble arithmetic progression but with a twist. In our example, the numbers (3, 7, 12, 18, 25, 33) didn't initially appear to be in standard arithmetic progression since the differences weren't constant. But calculating the differences revealed an increasing pattern: 4, 5, 6, 7, 8.
  • The increase of 1 in each difference signifies a specific rule in the sequence.
  • While not a typical arithmetic progression, it's related due to a systematic, incremental increase.
Once these differences are recognized, understanding the sequence becomes much simpler.
Predicting Numbers
Predicting the next number in a sequence is a valuable skill that relies heavily on understanding patterns. By identifying how a sequence progresses, you can make an educated guess about the future numbers in that sequence.

In our example (3, 7, 12, 18, 25, 33), we used the pattern in differences to predict the next term. Once the increasing pattern of differences (4, 5, 6, 7, 8) was identified, predicting the next difference was straightforward as the next difference would be 9.
  • Add the predicted difference (9) to the last known term (33) to predict the next term: 33 + 9 = 42.
  • These calculations are not just about mathematics; they also help in logical thinking and problem-solving by showing how sequences and patterns operate.
  • Understanding and predicting allows you to extend sequences systematically and accurately.
Such predictions are critical in mathematics and various real-world situations, where forecasting future conditions or trends is required.

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Most popular questions from this chapter

Obtain an estimate for each computation by rounding the numbers so that the resulting arithmetic can easily be performed by hand or in your head. Then use a calculator to perform the computation. How reasonable is your estimate when compared to the actual answer? \(0.79 \times 414\)

Use Polya's four-step method in problem solving to solve. A vending machine accepts nickels, dimes, and quarters. Exact change is needed to make a purchase. How many ways can a person with five nickels, three dimes, and two quarters make a 45 -cent purchase from the machine?

Use Polya's four-step method in problem solving to solve. New York City and Washington, D.C. are about 240 miles apart. A car leaves New York City at noon traveling directly south toward Washington, D.C. at 55 miles per hour. At the same time and along the same route, a second car leaves Washington, D.C. bound for New York City traveling directly north at 45 miles per hour. How far has each car traveled when the drivers meet for lunch at \(2: 24\) P.M.?

a. Use a calculator to find \(6 \times 6,66 \times 66,666 \times 666\), and \(6666 \times 6666\). b. Describe a pattern in the numbers being multiplied and the resulting products. c. Use the pattern to write the next two multiplications and their products. Then use your calculator to verify these results. d. Is this process an example of inductive or deductive reasoning? Explain your answer.

In \(1970,5 \%\) of lawyers in the United States were women. By \(2012,32 \%\) of lawyers were women, indicating an increase of approximately \(0.64 \%\) per year. (Source: Bureau of Labor Statistics) Describe how to use this information to write a mathematical model that estimates the percentage of women lawyers, \(W, x\) years after \(1970 .\)

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