What is the next number in the series 2, 10, 4, 20, 8, 40, …?
Correct answer: B. 16
Two series alternate: 2, 4, 8, … (doubling) and 10, 20, 40, … (doubling). The next term belongs to the first: 8 × 2 = 16.
hard
Answer and explanation
The correct answer is B. 16
Two series alternate: 2, 4, 8, … (doubling) and 10, 20, 40, … (doubling). The next term belongs to the first: 8 × 2 = 16.
Topic: Number Series and Simplification MCQs · Subject: Mathematics