Question

20,10,10,20,80 ? what is next term​

Answer 1

So according my logic ,

As you can see there are 2 pairs and one number

So , 20,10 =  20 + 10 = 30

Next , 10,20 = 10 + 20 = 30

So next pair should also give 30 :

According to that Next term is 50.

--> 80 - 50 = 30.

                           

Answer 2

Step-by-step explanation:

Given:

$20,10,10,20,80,?$

To find:

The next term of $20,10,10,20,80,?$

Solution:

$20,10,10,20,80,...$

Here the starting number is $20$ and the next value is $10.$ We can start our answer from this.

Multiply $20$ by $0.5$ to get $10.$

⇒ $20$ × $0.5=10$

Here twice the value of $0.5$ and multiplied by obtained terms. Repeat this step again.

⇒$10$ × $1=10$

Here, twice the value of $1.$

⇒$10$ × $2=20$

Here, twice the value of $2.$

⇒$20$ × $4=80$

Here, twice the value of $4.$

⇒$80$ × $8=640$

This sequence goes like this.

Answer:

Hence the next term is $640.$