What is 21

What is the next number?
What is the 7th number?
160, 80, 40, 20, 10, _

Correct answer:

a6 =  5
a7 =  2.5

Step-by-step explanation:

a1=160 a2=80  q=a2/a1=80/160=21=0.5  a3=a2 q=80 0.5=40 a4=a3 q=40 0.5=20 a5=a4 q=20 0.5=10 a6=a5 q=10 0.5=5
a7=a6 q=5 0.5=2.5



Did you find an error or inaccuracy? Feel free to write us. Thank you!










You need to know the following knowledge to solve this word math problem:

Related math problems and questions: