Question

enter the missing number.
5 20 80? 1280

Explanation:

Step1: Identify the sequence pattern

Check the ratio between consecutive terms: $\frac{20}{5}=4$, $\frac{80}{20}=4$. The pattern is multiplying by 4.

Step2: Calculate the missing term

Multiply the previous term by 4: $80 \times 4 = 320$

Step3: Verify the pattern

Check if the next term fits: $320 \times 4 = 1280$, which matches the given last term.

Answer:

320