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Concept-wise Practice

digit-arrangement MCQ Questions for Class 11

digit-arrangement se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

11 questions tagged with digit-arrangement.

Digits (1,2,3,4,5,6,7,8) से repetition allowed (6)-digit numbers में exactly (3) even digits हों, तो count क्या है?

Using digits (1,2,3,4,5,6,7,8) with repetition allowed, if exactly (3) even digits occur in (6)-digit numbers, what is the count?

Explanation opens after your attempt
Correct Answer

A. \(^{6}C_3\cdot4^3\cdot4^3\)

Explanation

Simple Explanation

Even positions चुनें और फिर even तथा odd choices independently multiply करें। परीक्षा में exactly digit type में positions first choose करें। / Choose the even positions and then multiply even and odd choices independently. In exams choose positions first in exactly digit-type problems.

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Digits (0) से (9) तक repetition बिना (6)-digit even numbers में non-zero even last digit case का count क्या होगा?

Using digits (0) to (9) without repetition, what is the count for (6)-digit even numbers with a non-zero even last digit?

Explanation opens after your attempt
Correct Answer

A. \(4\cdot8\cdot{}^{8}P_4\)

Explanation

Simple Explanation

Last digit के (4) non-zero even choices हैं और first digit के (8) non-zero choices बचते हैं। परीक्षा में first और last restrictions को साथ संभालें। / There are (4) non-zero even choices for the last digit and (8) remaining non-zero choices for the first digit. In exams handle first and last restrictions together.

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Digits (0,1,2,3,4,5,6,7,8,9) से repetition बिना (6)-digit numbers बनते हैं और number even हो। (0) last digit case का count क्या है?

Using digits (0,1,2,3,4,5,6,7,8,9) without repetition, (6)-digit even numbers are formed. What is the count when (0) is the last digit?

Explanation opens after your attempt
Correct Answer

A. \(^{9}P_5\)

Explanation

Simple Explanation

Last digit (0) fix होने पर first place पर zero issue नहीं रहता और (9) non-zero digits से (5) places भरते हैं। परीक्षा में zero-last case अलग करें। / When the last digit is fixed as (0), there is no leading-zero issue and (5) places are filled from (9) non-zero digits. In exams separate the zero-last case.

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Digits (1,2,3,4,5,6) से repetition allowed (5)-digit numbers में exactly (2) odd digits हों, तो count कौन-सी है?

Using digits (1,2,3,4,5,6) with repetition allowed, if exactly (2) odd digits occur in (5)-digit numbers, what is the count?

Explanation opens after your attempt
Correct Answer

A. \(^{5}C_2\cdot3^2\cdot3^3\)

Explanation

Simple Explanation

Exactly (2) odd positions चुनें, फिर odd और even digits के choices multiply करें। परीक्षा में exactly type digit questions में positions first चुनें। / Choose exactly (2) odd positions, then multiply choices of odd and even digits. In exams choose positions first in exactly-type digit questions.

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Digits (0,1,2,3,4,5,6,7,8) से repetition बिना (5)-digit even numbers में non-zero even last digit case का count क्या है?

Using digits (0,1,2,3,4,5,6,7,8) without repetition, what is the count for (5)-digit even numbers with a non-zero even last digit?

Explanation opens after your attempt
Correct Answer

A. \(4\cdot7\cdot{}^{7}P_3\)

Explanation

Simple Explanation

Last digit के (4) choices हैं, first digit के (7) non-zero choices बचते हैं, फिर (3) places fill होती हैं। परीक्षा में zero और non-zero even cases अलग करें। / There are (4) choices for the last digit, (7) remaining non-zero choices for the first digit, and then (3) places are filled. In exams separate zero and non-zero even cases.

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(0,1,2,3,4,5,6,7,8) से repetition बिना (5)-digit even numbers बनाते समय (0) last digit case में count क्या होगा?

Using (0,1,2,3,4,5,6,7,8) without repetition, what is the count for (5)-digit even numbers when (0) is the last digit?

Explanation opens after your attempt
Correct Answer

A. \(^{8}P_4\)

Explanation

Simple Explanation

Last digit (0) fix होने पर बाकी (4) places में (8) non-zero digits से ordered selection होता है। परीक्षा में zero-last case leading restriction हटाता है। / When the last digit is fixed as (0), the remaining (4) places use ordered selection from (8) non-zero digits. In exams the zero-last case removes the leading restriction.

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Digits (1,2,3,4,5,6,7) से repetition allowed (4)-digit numbers में exactly (2) positions पर even digits हों, तो count कौन-सी है?

Using digits (1,2,3,4,5,6,7) with repetition allowed, if exactly (2) positions contain even digits in a (4)-digit number, what is the count?

Explanation opens after your attempt
Correct Answer

A. \(^{4}C_2\cdot3^2\cdot4^2\)

Explanation

Simple Explanation

Even positions चुनें, उन पर (3) even choices और बाकी पर (4) odd choices हैं। परीक्षा में exactly condition में positions first चुनें। / Choose the even positions, then each has (3) even choices and the rest have (4) odd choices. In exams choose positions first in exactly conditions.

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Digits (0,1,2,3,4,5,6) से repetition बिना (4)-digit numbers बनाने हैं जो (5) से divisible हों। सही count expression कौन-सा है?

Using digits (0,1,2,3,4,5,6) without repetition, (4)-digit numbers divisible by (5) are formed. Which count expression is correct?

Explanation opens after your attempt
Correct Answer

A. \(6\cdot5\cdot4+5\cdot5\cdot4\)

Explanation

Simple Explanation

Last digit (0) या (5) हो सकता है, और (0) first digit पर restriction बदलता है। परीक्षा में divisibility by (5) में unit digit cases बनाएं। / The last digit can be (0) or (5), and (0) changes the first-digit restriction. In exams make unit-digit cases for divisibility by (5).

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(0,1,2,3,4,5,6,7) से repetition बिना (5)-digit even numbers बनाने में (0) को last digit case अलग क्यों लिया जाता है?

Why is the case with (0) as the last digit treated separately when forming (5)-digit even numbers without repetition from (0,1,2,3,4,5,6,7)?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (0) last में valid है पर first में invalid हैBecause (0) is valid at the last place but invalid at the first place

Explanation

Simple Explanation

Even number में (0) unit place पर आ सकता है लेकिन leading digit नहीं बन सकता। परीक्षा में digit problems में zero cases अलग रखें। / In an even number, (0) may be the unit digit but cannot be the leading digit. In exams keep zero cases separate in digit problems.

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Digits (0,1,2,3,4,5) से repetition allowed (3)-digit numbers बनते हैं। Count क्या होगी?

(3)-digit numbers are formed from digits (0,1,2,3,4,5) with repetition allowed. What is the count?

Explanation opens after your attempt
Correct Answer

B. \(5\cdot6\cdot6\)

Explanation

Simple Explanation

First digit (0) नहीं हो सकती, बाकी दो places पर (6) choices हैं। परीक्षा में leading zero restriction अलग रखें। / The first digit cannot be (0), and the remaining two places have (6) choices. In exams handle the leading-zero restriction separately.

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Digits (0,1,2,3,4,5,6) से repetition बिना (4)-digit odd numbers बनाने में last digit choices कौन-सी होंगी?

When forming (4)-digit odd numbers without repetition from digits (0,1,2,3,4,5,6), what are the last digit choices?

Explanation opens after your attempt
Correct Answer

B. (1,3,5)

Explanation

Simple Explanation

Odd number के लिए last digit odd होनी चाहिए। परीक्षा में digit problems में unit place condition पहले तय करें। / For an odd number, the last digit must be odd. In exams decide the unit-place condition first in digit problems.

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