What is the next number in the sequence: 1, 4, 9, 16, 25, ...?
Answer: B
The sequence consists of the squares of natural numbers.
\(1 = 1^2\)
\(4 = 2^2\)
\(9 = 3^2\)
\(16 = 4^2\)
\(25 = 5^2\)
The next term will be \(6^2 = 36\).