Question

What is the 20th term for the sequence 3,7,11,15…..

Answer 1

79

Explanation:

Keep adding 4 since the common difference is 4

3,7,11,15,19,23,27,31,35,39,43,47,51,55,59,63,67,71,75,79

Answer 2

20x4=80 because 4 is the constant linear increase
Add the original number 3
80+3=83
83 is your answer