UPSC Prelims 2021 · CSAT (Paper 2) · Q50
Basic Numeracy
Medium · Number series
What is the value of X in the following series?
4, 9, 19, 39, X
UPSC Prelims 2021 · CSAT (Paper 2) · Q50
Medium · Number series
What is the value of X in the following series?
4, 9, 19, 39, X