Complete the Sequence: Finding Missing Numbers in 12 __ 10 __ 8 7 6 5 4 3 2 1

Question

12 ☐ 10 ☐ 8 7 6 5 4 3 2 1

Which numbers are missing from the sequence so that the sequence has a term-to-term rule?

Video Solution

Solution Steps

00:00 Complete the missing elements
00:03 Notice the difference between each element (D)
00:15 Complete according to the pattern we found
00:25 Again complete according to the same pattern (add 1)
00:32 And this is the solution to the question

Step-by-Step Solution

It is possible to see that there is a difference of one number between each number.

That is, 1 is added to each number and it will be the next number:

1+1=2 1+1=2

2+1=3 2+1=3

3+1=4 3+1=4

Etcetera. Therefore, the next numbers missing in the sequence will be:8+1=9 8+1=9

10+1=11 10+1=11

Answer

11 , 9