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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

Q26 2023, Basic Arithmetical Operations

If p, q, r and s are distinct single digit positive numbers, then what is the greatest value of (p + q) (r + s)?

यदि p, q, r और s एक अंक वाली भिन्न धनात्मक संख्याएँ हैं, तो (p + q)(r + s) का महत्तम मान क्या है?

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To find the greatest value of (𝑝+𝑞)(𝑟+𝑠) where 𝑝,𝑞,𝑟, and 𝑠 are distinct single-digit positive numbers, we need to choose the largest possible digits for 𝑝,𝑞,𝑟, and 𝑠.

The numbers 6, 7, 8, and 9 are the ones to consider for maximizing the value.

It is important to choose numbers that are close in value to maximize the result.

Therefore, the greatest value of (𝑝+𝑞)(𝑟+𝑠) = (9+6)(8+7)=15×15=225.

So, the correct answer is (b).

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