320
The next number in the sequence 5, 10, 20, 40 is 80. Each number in the sequence is multiplied by 2 to get the next number. So, 40 multiplied by 2 equals 80.
40 5 10 20 40 80 160.......double the number each time.
If you mean: 5, 10, 20, 40 then the following number is twice the previous number which will be 80
To find the common ratio of the sequence 80, 20, 5, you divide each term by the previous term. For the first two terms, the ratio is 20/80 = 1/4. For the next two terms, the ratio is 5/20 = 1/4 as well. Thus, the common ratio of the sequence is 1/4.
20
80
If you mean: 5 10 20 40 then it is 80
40 5 10 20 40 80 160.......double the number each time.
If you mean: 5, 10, 20, 40 then the following number is twice the previous number which will be 80
Double it every time and so the next number will be 80
A number sequence is not a question. So there can be no "answer".
The next number in the sequence will be 56.
20
20
The rest of the sequence would be as follows: 40, 20, 10, 5... because each successive number is half of the prior.
1 to 4
25 is the next number that appears in that sequence.