To find the $N$th term of each sequence, we'll use the formula for the $N$th term of an arithmetic sequence:

$a_N = a_1 + (N-1) \cdot d$

Where:

• $a_N$ is the $N$th term,
• $a_1$ is the first term,
• $d$ is the common difference between the terms,
• $N$ is the position of the term in the sequence.

Let's solve each one.

1. Sequence: 1, 5, 9, 13, …

• First term $a_1 = 1$
• Common difference $d = 5 - 1 = 4$
• To find the 27th term ($N = 27$):

$a_{27} = 1 + (27 - 1) \cdot 4 = 1 + 26 \cdot 4 = 1 + 104 = 105$

The 27th term is 105.

2. Sequence: 20, 15, 10