Understanding Arithmetic Sequences

1. What is the common difference in the arithmetic sequence 3, 7, 11, 15?

A) 2 B) 3 C) 4 D) 5

2. If the first term of an arithmetic sequence is 5 and the common difference is 3, what is the 10th term?

A) 32 B) 35 C) 30 D) 28

3. Which formula represents the nth term of an arithmetic sequence?

A) a_n = a_1 + (n-1)d B) a_n = a_1 * d^(n-1) C) a_n = n * d D) a_n = a_1 - (n-1)d

4. In the arithmetic sequence 2, 5, 8, ..., what is the 20th term?

A) 59 B) 62 C) 64 D) 66

5. What is the sum of the first 10 terms of the arithmetic sequence 4, 8, 12, ...?

A) 220 B) 240 C) 200 D) 180