Question

Identify the pattern for the following sequence. Find the next three terms in the sequence.

-15, -11, -7, -3 ____, _____, _____,...

A: Subtract 4; -7, -11, -15
B: Add 4; 2, 6, 10
C: Subtract 4; 1, 5, 9
D: Add 4; 1, 5, 9​

Answer 1

D is the answer: 4, 1, 5, 9

Explanation:

Answer 2

D: Add 4; 1, 5, 9​

Explanation:

Firstly, we can look at the preceding sequence: -15, -11, -7, and -3. It's pretty much impossible to be subtract 4, since -15 - 4 = -19, and it only goes downhill from there, deviating from the original sequence. Hence, the front sequence should be following the pattern of add 4.

Now, to decide between B and D, all you have to do is add 4 to the last term of the sequence to continue it. In this case, that would be -3 + 4 = 4 - 3 = 1. Hence, we can instantly identify the correct option is D: Add 4; 1, 5, 9​.

Hope this helped!