Question

Find the missing number: 2, 6, 12, 20, 30, ?

• A. 40
• B. 42
• C. 44
• D. 46

Hint:

This series also follows the pattern $n^2 + n$: $1^2+1=2, 2^2+2=6, 3^2+3=12...$

Answer 1

The Correct Option is B

Step 1: Concept
Number series with increasing differences.
Step 2: Analysis
6-2=4, 12-6=6, 20-12=8, 30-20=10. The differences are 4, 6, 8, 10.
Step 3: Conclusion
The next difference must be 12. So, 30 + 12 = 42.
Final Answer: (B)