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(#M40020775) EXAM QUESTION permutation Keep an EYE

Six boxes are numbered 1,2,34,5 and 6. Each box must contain either a white ball or a black ball. At least one box must contain a black ball and boxes containing black balls must be consecutively numbered. find the total number of ways of placing the balls.

A.

15

B.

20

C.

21

D.

36

Asked In exam MAN (12 years ago)

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(#M40020773) EXAM QUESTION permutation Keep an EYE

In a certain laboratory, chemicals are identified by a colour-coding system. There are 20 different chemicals. Each one is coded with either a single colour or a unique two-colour pair. If the order of colours in the pairs does not matter, what is the minimum number of different colours needed to code all 20 chemicals with either a single colour or a unique pair of colours?

A.

7

B.

6

C.

5

D.

8

Asked In exam MAN (12 years ago)

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(#M40020772) SELF QUESTION Keep an EYE

Find the greatest number by which if we divide 740, 838 and 985, then in each case the remainder is the same.

vikash singh (12 years ago)

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(#M40020769) EXAM QUESTION permutation Keep an EYE

How many natural numbers less than a lakh can be formed with the digits 0,6 and 9?

A.

242

B.

243

C.

728

D.

729

Asked In exam MAN (12 years ago)

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(#M40020768) EXAM QUESTION permutation Keep an EYE

A local delivery company has three packages to deliver to three different homes. if the packages are delivered at random to the three houses, how many ways are there for at least one house to get the wrong package?

A.

3

B.

5

C.

3!

D.

5!

Asked In exam MAN (12 years ago)

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(#M40020767) SELF QUESTION Keep an EYE

Let N = 23×317×56×74 and M = 212×35×54×78. P is total number of even factors of N such that they are not factors of M. Q is the total number of even factors of M such that they are not factors of N. Then 2P -Q = ?

vikash singh (12 years ago)

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(#M40020763) EXAM QUESTION permutation Keep an EYE

Jay wants to buy a total of 100 plants using exactly a sum of Rs 1000. He can buy Rose plants at Rs 20 per plant or marigold or Sun flower plants at Rs 5 and Re 1 per plant respectively. If he has to buy at least one of each plant and cannot buy any other type of plants, then in how many distinct ways can Jay make his purchase?

A.

2

B.

3

C.

4

D.

5

Asked In exam MAN (12 years ago)

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(#M40020762) SELF QUESTION Keep an EYE

Find the number of ways of writing 60 as a product of two co - primes

vikash singh (12 years ago)

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(#M40020760) SELF QUESTION Keep an EYE

: Find the sum of all the co-primes of 144

vikash singh (12 years ago)

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(#M40020758) SELF QUESTION Keep an EYE

Find the number of co-primes to 144 which are less than that of it

vikash singh (12 years ago)

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