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The number of all positive divisors o...

The number of all positive divisors of ` 2 ^5 , 3^4 , 5^3` is

A

140

B

120

C

168

D

166

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The correct Answer is:
A
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE
  1. The sum of divisores of 2^(5).3^(4) is

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  2. The number of positive divisors of 2 ^5 , 3^6 ,7^3 is

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  3. The number of all positive divisors of 2 ^5 , 3^4 , 5^3 is

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  4. Number of even proper divisors of 1008 is

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  5. The number of positive odd divisors of 216 is

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  6. The number of odd factors of 36000 is

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  7. The number of ways the numbers 10,800 can be resolved as a product of ...

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  8. The number of ways in which 1440 can be divided into two factors exclu...

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  9. The sum of odd divisors of 360 is

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  10. If one quarter of all three element subsets of the set A={a(1), a(2), ...

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  11. The number of subsets of the set A={a(1),a(2),………..a(n)} which contain...

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  12. The number of subsets of {1,2,3,. . . .9} conatining at least one ...

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  13. A set contains (2n+1) elements. If the number of subsets of this set w...

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  14. In an election, no. of candidates is one more than the number of perso...

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  15. The number of ways of dividing 12 boys into 2 groups of 7,5 boys r...

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  16. The number of ways in which 12 books can be put in 3 shelves, 4 on eac...

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  17. The number of ways of dividing 100 scouts into 3 squads of 50, 30, 20 ...

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  18. The number of ways of dividing 15 cards into 3 groups of 5 cards each ...

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  19. If the number of subsets with 8 elements from the set A={a(1),a(2),a(3...

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  20. At an election three wards of a town of a are canvassed by ...

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