UPSC Prelims 2025 · CSAT (Paper 2) · Q67
Basic Numeracy
Hard · Number theory: remainders
What is the remainder when 7^1 + 7^2 + 7^3 + . . . + 7^50 is divided by 5 ?
UPSC Prelims 2025 · CSAT (Paper 2) · Q67
Hard · Number theory: remainders
What is the remainder when 7^1 + 7^2 + 7^3 + . . . + 7^50 is divided by 5 ?