Question

Find the missing number: 1, 4, 9, 16, ?, 36

• A. 20
• B. 25
• C. 30
• D. 27

Answer 1

Answer:

B. 25

The sequence is:

1, 4, 9, 16, ?, 36

These are perfect squares:

• $(1 = 1^2)$

• $(4 = 2^2)$

• $(9 = 3^2)$

• $(16 = 4^2)$

• $(? = 5^2 = 25)$

• $(36 = 6^2)$

Missing number = 25.