# Basic Arithmetic · Basic Numeracy · UPSC Civil Service

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UPSC Civil Service Prelims Paper II 2023 (CSAT)
What is the remainder when 85 × 87 × 89 × 91 × 95 × 96 is divided by 100?
UPSC Civil Service Prelims Paper II 2023 (CSAT)
What is the unit digit in the expansion of (57242)9×7×5×3×1?
UPSC Civil Service Prelims Paper II 2023 (CSAT)
D is a 3-digit number such that the ratio of the number to the sum of its digits is least. What is the difference between the digit at the hundred's p...
UPSC Civil Service Prelims Paper II 2023 (CSAT)
A 3-digit number ABC, on multiplication with D gives 37DD where A, B, C and D are different non-zero digits. What is the value of A + B + C?
UPSC Civil Service Prelims Paper II 2023 (CSAT)
What is the sum of all digits which appear in all the integers from 10 to 100?
UPSC Civil Service Prelims Paper II 2023 (CSAT)
A principal P becomes Q in 1 year when compounded half-yearly with R% annual rate of interest. If the same principal P becomes Q in 1 year when compou...
UPSC Civil Service Prelims Paper II 2023 (CSAT)
Consider a 3-digit number. Question: What is the number? Statement-1: The sum of the digits of the number is equal to the product of the digits. St...
UPSC Civil Service Prelims Paper II 2023 (CSAT)
There are large number of silver coins weighing 2 gm, 5 gm, 10 gm, 25 gm, 50 gm each. Consider the following statements: 1. To buy 78 gm of coin...
UPSC Civil Service Prelims Paper II 2023 (CSAT)
What is the remainder if 2192 is divided by 6?
UPSC Civil Service Prelims Paper II 2023 (CSAT)
AB and CD are 2-digit numbers. Multiplying AB with CD results in a 3-digit number DEF. Adding DEF to another 3-digit number GHI results in 975. Furthe...
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