I'm guessing your sequence is 1, 3, 6, 10, 15, ... In which case it continues: 21, 28, 36, 45, 55, 66, ... (These are the triangular numbers.)
The numbers in the sequence are decreasing by 8 each time. Therefore, the next number in the sequence is 47 - 8 = 39.
34, 55, 89, 144 is a portion of the Fibonacci sequence. The next number is 89 + 144 which is 233.
23 21 (33 or 19)
Assuming the sequence of numbers declines by 5 each time, the next three numbers would be 40, 35 and 30.
55
The next number is 48.
55
I'm guessing your sequence is 1, 3, 6, 10, 15, ... In which case it continues: 21, 28, 36, 45, 55, 66, ... (These are the triangular numbers.)
The numbers in the sequence are decreasing by 8 each time. Therefore, the next number in the sequence is 47 - 8 = 39.
34, 55, 89, 144 is a portion of the Fibonacci sequence. The next number is 89 + 144 which is 233.
23 21 (33 or 19)
Assuming the sequence of numbers declines by 5 each time, the next three numbers would be 40, 35 and 30.
5 goes into 45 and 55
6590. One possible sequence is 2472/3N3 - 14421/2N2 + 26165/6N - 1390
The next number in the Fibonacci (note the spelling) sequence is 144. Each number after the initial 1s is the sum of its two predecessors.
55