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All posts related to Quantitative aptitude

Maddike Nagarjunareddy
Shared from Permutation & Combination on Apr 21, 2012 6:08 AM

How many four-digit numbers are there, such that consecutive digits are different?

 
9 × 103
9 × 8 × 7 × 6
9 × 9 × 9 × 9
9 × 9 × 8 × 7
None of these
Please type your answer before submitting.
Ramesh S Mudalagi

D should be the answer as the consecutive numbers must be different as stated in the question.

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Maddike Nagarjunareddy
Shared from Permutation & Combination on Apr 21, 2012 6:07 AM

A businessman has to visit 4 cities, viz. Bangalore, Chennai, Hyderabad and Mumbai, in a day. In how many ways can he do this so that he does not go to Chennai before Bangalore?

 
6
8
12
16
24
Please type your answer before submitting.
Jainam

The explanation isn't displayed

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Maddike Nagarjunareddy
Shared from Permutation & Combination on Apr 21, 2012 6:01 AM

In how many ways can a person purchase 8 articles from 6 shops?

 
8P6
8C6
68
86
48
Please type your answer before submitting.
Maddike Nagarjunareddy

C

Maddike Nagarjunareddy
Shared from Permutation & Combination on Apr 21, 2012 6:00 AM

How many three-lettered passwords can be formed using the English alphabet, such that the three letters are different?

 
263 - 1
263 - 26
26 × 25 × 24
26! - 26
None of these
Please type your answer before submitting.
Sagar

Please explain this question How many three-lettered passwords can be formed using the English alphabet, such that the three alphabets should not be the same? correct answer: Total passwords = 26 × 26 × 26 Out of these 26 will have all the three letters same. = 263 – 26.

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Maddike Nagarjunareddy
Shared from Permutation & Combination on Apr 21, 2012 6:00 AM

How many four-lettered palindromes (same in both the directions), with or without meaning can be formed using the English alphabet?

 
26
262
263
26 × 27
26 × 25
Please type your answer before submitting.
Reetayan Das

Didnt understand explanation...i know pallindrome is like "abba"...means 2nd and 3rd and 1st and 4 rth are same...

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