Please enter the following details
Free Daily Targets & Mocks
Study Material & Formulas PDFs
1 on 1 Mentorship
Solution
Pattern followed,
$$({3}\times{3}) + 3$$ = 12
$$({4}\times{4}) + 4$$ = 20
$$({5}\times{5}) + 5$$ = 30
$$({6}\times{6}) + 6$$ = 42
therefore, 42 is the answer.
Create a FREE account and get:
- Download RRB Study Material PDF
- 45+ RRB previous papers with solutions PDF
- 300+ Online RRB Tests for Free
