80
20, 15, 10, 5, 0, -5, -10, -15, -20 and so on.
The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40
The rest of the sequence would be as follows: 40, 20, 10, 5... because each successive number is half of the prior.
1*40 4*10 5*8 2*20
40 5 10 20 40 80 160.......double the number each time.
40.
80
If you mean: 5 10 20 40 then it is 80
1 x 5 = 5 5 x 10 = 50 ; 10 is 5+5 50 x 20 = 1000; 20 is 10+10 1000 x 40 = 40,000 ; 40 is 20 + 20 40,000 x 80 = 3,200,000; 80 is 40+40 therefore the next 2 numbers are 40,000 and 3,200,000
If you mean: 5, 10, 20, 40 then the following number is twice the previous number which will be 80
1, 10, 2, 20, 3, 30, 4, 40, 5, 50, and so on.
20, 15, 10, 5, 0, -5, -10, -15, -20 and so on.
These may help you answer your questions: 1, 2, 4, 5, 8, 10, 20 and 40.
1, 2, 4, 5, 8, 10, 20, 40 , -1, -2, -4, -5, -8, -10, -20, -40
20,40,60 Proof (20)(20/4=5)(20/5=4)(20/10=2) And (40)(40/4=10)(40/5=8)(40/10=4) And (60)(60/4=15)(60/5=12)(60/10=6)
40/10 = 20/a 4= 20/a 20/4 = a a= 5