This is actually two sequences staggered back and forth:
1 4 9 16 25
1 3 6 10
As you can see, the first sequence is a series of perfect squares, and the second sequence is a series with a rate of change that is increasing by increments of one.
The next number in the original sequence will be from the second series, making it 10 + 5, or 15. The sequence as a whole then continues like so:
1 1 4 3 9 6 16 10 25 15 36 21 49 28 64 36 81 45 100 ...
15
5
The next number is -21
the answer should be 5
The next number is 30. The numbers are increasing in multiples of 5.
15
The Next NumberThe next number is 25 if you use the following pattern: 5, (the number 10), 15 (the first number +10), (the number 10), and the next number is the third number +10 or 25.or you could think of it this way:5, 10 (+5), 15 (+5), -5 (10)The pattern is +5, +5, -5, so the next number would be 15, the next 20, and the next 15.
5 10 15 10 5
5+5 = 10 10+5 = 15 15-5 = 15 10+5 = 15
5
5
5
The next number is -21
the answer should be 5
The next number is 30. The numbers are increasing in multiples of 5.
What would be the next number in this series 15 12 13 10 11 8?
21: (3)+3=(6)+4=(10)+5=(15)+6=(21)