next number in sequence 3 -6 12 4 20 ?
Mathematics · College · Tue Nov 03 2020
Answered on
Given the number sequence:
3, -6, 12, 4 and 20
Solution:
If we look for a pattern we can see that we subtracted 9 first, then added 18, for the third term we subtracted 8 then added 16. Hence it can be seen that the value decreases by 1, in subtracting and the value increases by twice the current subtracted value, thus we can determine the next terms by subtracting 7 and adding 14, following the sequence.
20 - 7
6th term =13
7th term
= 13 + 14
= 27
Final answer:
6th term = 13
7th term = 27