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UPSC Prelims

CSAT Year Wise (Temporary Link, This will be removed and no PDFs shall be downloaded here. Please download CSAT subject wise files) / सी सैट

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CSAT 2023

Q7 2023, Number System: Divisibility Rules

What is the remainder when 85 × 87 × 89 × 91 × 95 × 96 is divided by 100?

जब 85 × 87 × 89 × 91 × 95 × 96 को 100 से भाग दें, तो शेषफल क्या रहता है ?

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In the expression 85 × 87 × 89 × 91 × 95 × 96, there are two instances of the number 5 (85, 95) and one instance of the number 4 (96 = 24×4).

Now, 100 = 5 × 5 × 4 = 100

Therefore, the given expression is divisible by 100 with no remainder.

Thus, option (a) is the correct answer.

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