CSAT 2020

Q. What is the remainder when 51 x 27 x 35 x 62 x 75 is divided by 100?

(a) 50
(b) 25
(c) 5
(d) 1
Correct Answer: (a) 50

Question from UPSC Prelims 2020 CSAT Paper

Explanation :

51 x 27 x 35 x 62 x 75

Multiplying the digit at ones place of each term in the product
1×7×5×2×5
35×10
350
Diving this by 100 we get remainder as 50

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