MBA Exam

A sequence x1,x2,x3 Is said to be in harmonic progression if the reciprocals 1/x1,1/x2,1/x3 are in arithmetic progression. The 5th and 7th term for harmonic progression are 30 and 50 respectively what is difference between 6th and 4th term ?

1) 12.5
2) 20
3) none of them
4) 100

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MBA Other Question

the sum of all the five digit numbers that can be formed using digits 1,3,5,7,9 (without repetition) is

1) 6666600
2) 6666660
3) 6666666
4) None of these
There are 5 Arithmetic Progressions of 9 terms each. The common property of allthese APs is that they all are composed of positive integers and have the samemiddle term, X. If it is known that the sum of all the numbers of the APs is 4500, then find out the value of X.(1) 50 (2) 100(3) 200 (4)900

1) 1
2) 2
3) 3
4) 4