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The video tutorial covers numbers from 6 to 21, divided into three sections: introduction, exploration, and advanced concepts. Each section builds on the previous one, providing a comprehensive understanding of these numbers.

What number comes immediately after 6 in the sequence?

• 9

• 8

• 7

• 5

Which number is directly before 12 in the sequence?

• 11

• 13

• 10

• 14

What is the number that follows 15?

• 18

• 17

• 16

• 14

Identify the number that comes right after 18.

• 17

• 19

• 20

• 21

Which number completes the sequence after 20?

• 23

• 22

• 21

• 19