An arithmetic sequence starts at 7, and each next number is 4 greater. What is the twenty-fifth number?
Show hints
- There are 24 steps from the first term to the twenty-fifth.
- Calculate 7 + 24 × 4.
Show the answer and solution
Answer: 103
There are 24 increases of 4 from the first to the twenty-fifth number. Thus, 7 + 24 × 4 = 103.