Question

Which number is next 2 7 8 3 12 9

Answer 1

Next number is 4.

Step-by-step explanation:

Given : 2 7 8 3 12 9

To find : which number is next

Solution : We have given that 2 ,7 ,8, 3 ,12 ,9.

We can see this it has two group ( 2,7,8) ;( 3 , 12, 9)

Second group is created by first

First number on adding 1 in 2

Second number on adding 5 in 7

Third number on adding 1 in 8

Now we can create next group by second group

3 + 1 = 4

12 + 5 = 17

9 +1 = 10

Then next group would be ( 4 ,17,10 )

Therefore, Next number is 4.

Answer 2

The correct answer is: 4

Step-by-step explanation:
In the given series, there are three sub-series, which are as follows:

Series-1: 2, 3, ?
Series-2: 7, 12, ?
Series-3: 8, 9, ?

In series-1, "1" is being added to every number. Hence, the next number is 4.
In series-2, "5" is being added to every number, Hence, the number next to 4 will be 17.
In series-3, "1" is being added to every number. Hence, the next number to 17 will be 10.

But as the question is asked about the next number to 9, hence the correct answer will be 4.