Question

9,8,10,9,11, ?12,11 find next number. A)22 B)9 C)13 D)10​

Answer 1

The correct option is D.

Step-by-step explanation:

The given number series is

9,8,10,9,11, ?12,11

We need to find the missing number.

$9-1=8$                 (Subtract 1)

$8+2=10$               (Add 2)

$10-1=9$                 (Subtract 1)

$9+2=11$               (Add 2)

It means there are alternate operations "Subtract 1" and "Add 2".

To find the next number we need to subtract 1 from 11.

$11-1=10$                 (Subtract 1)

The missing number is 10.

$10+2=12$               (Add 2)

$12-1=11$                 (Subtract 1)

Therefore, the correct option is D.

#Learn more

23,115,805,? the answer will be in the number series process​.

https://brainly.in/question/11439416

Answer 2

The "next number D) 10​" is correct.

Step-by-step explanation:

The given sequence are:

9, 8, 10, 9, 11, ?, 12, 11

To find, the next number = ?

The pattern follow:

Previous number  - 1, Previous number  + 2, Previous number  - 1, Previous number  + 2, ......

8 = 9 - 1 = 8

10 = 8 + 2 = 10

9 = 10 - 1 = 9

11 = 9 + 2 = 11

? = 11 - 1 = 10

12 = 10 + 2 = 2

11 = 12 - 1 = 11

∴ The next number = 10

Thus, the "next number D) 10​" is correct.