What is the next number 1,1,2,6,24 ?

The given sequence is 1, 1, 2, 6, 24, ...

This sequence is formed by the factorial of consecutive numbers:

• $0!$
• $1!$
• $2!=$
• $3!=$
• $4!=$

Following this pattern, the next number is:

• $5!=$

Therefore, the next number in the sequence is 120.