What is the next number in the sequence: 201, 181, 163, 147, 133, ___?
Observe that each number in the sequence decreases by consecutive even numbers: 20, 18, 16, 14, 12. Continuing this pattern, the next number is 133 - 12 = 121.
Excellent! The pattern decreases by consecutive even numbers: 20, 18, 16, 14, 12. Following this sequence, the next decrease is by 10, so 133 - 12 = 121.