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What is the remainder when 91×92×93×94×95×96×97×98×99 is divided by 1261?

20223Mprelimsupscyear-2022p2quantitative-aptitudequantitative-abilitynumbers
A.3
B.2
C.1
D.0Correct
Explanation & Solution

Correct Option: 0

We need to find the remainder when the product 91 × 92 × 93 × 94 × 95 × 96 × 97 × 98 × 99 is divided by 1261. Let us factorize 1261: 1261 = 13 × 97. Notice that the given product contains the term 97. Since 97 is one of the factors in the numerator, the entire product is a multiple of 97 and consequently a multiple of 1261 (since 1261 = 13 × 97). Therefore, when the product is divided by 1261, the remainder is 0.

हिंदी में प्रश्न एवं आदर्श उत्तर

91×92×93×94×95×96×97×98×99 को 1261 से भाग देने पर शेषफल क्या होगा?

A.3
B.2
C.1
D.0सही

सही उत्तर: 0

हमें 91 × 92 × 93 × 94 × 95 × 96 × 97 × 98 × 99 को 1261 से विभाजित करने पर शेषफल ज्ञात करना है। 1261 के गुणनखंड 13 × 97 हैं। चूँकि दी गई श्रृंखला में 97 एक गुणनखंड के रूप में मौजूद है, यह पूरा गुणनफल 1261 से पूर्णतः विभाज्य है। अतः शेषफल 0 होगा।

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