Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 10

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IMPORTANT

Earn 100

The total number of $4$ -digit numbers whose greatest common divisor with $18$ is $3$ is _____.

33.33% studentsanswered this correctly

Important Questions on Permutation and Combination

HARD

JEE Main

IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 11

The number of times the digit

3

will be written when listing the integers from

1

to

1000

is

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 12

The number of

5

digit numbers which are divisible by

4

with digits from the set

{1, 2, 3, 4, 5}

and the repetition of digits is allowed, is.........

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 13

Number of ways of selecting pair of black squares in chessboard such that they have exactly one common corner is equal to

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JEE Main

IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 14

If the different permutations of the word

EXAMINATION

are listed as in a dictionary, then how many words (with or without meaning) are there in this list before the first word starting with

M

.

HARD

JEE Main

IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 15

Number of numbers greater than a million and divisible by

5

which can be formed by using only the digits

1, 2, 1, 2, 0, 5

&

2

is -

HARD

JEE Main

IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 16

The total number of ways in which four boys and four girls can be seated around a round table, so that no two girls sit together is equal to

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 17

5

boys &

3

girls are sitting in a row of

8

seats. Number of ways in which they can be seated so that not all the girls sit side by side, is

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 18

Ten different letters of alphabet are given. Words with four letters are formed from the these letters, then the number of words which have at least one letter repeated is -