Elitmus
Exam
Numerical Ability
Given a 3 digit number. for example 343 and the multiplication of the digits will give 36. as for example 3*4*3 = 36.
This way how many possible three digit numbers can be formed ??
Read Solution (Total 5)
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- find prime factors of 36 first=>3^2,2^2
941=3! ways-6
661=3!/2! ways-3
632=3! ways-6
334=3!/2! ways-3
229=3!/2! ways-3
total 21 ways
we can use permutation and combinations to arrive at solution easily - 9 years agoHelpfull: Yes(20) No(1)
- 941=3! ways-6
632=3! ways-6
661=3!/2! ways-3
334=3!/2! ways-3
229=3!/2! ways-3
total 21 ways
this is rigth answer :)
- 9 years agoHelpfull: Yes(4) No(0)
- find prime factors of 36 first=>3,4,3
941=3! ways-6
661=3!/2! ways-3
632=3! ways-6
334=3!/2! ways-3
total 18 ways - 9 years agoHelpfull: Yes(1) No(3)
- ans: 12
Solution: factors of 36 is 3,3,2,2
So by these we can form 3 digits no. such as- 362,922,334
so by arranging the digits we can get 3!+3+3= 12 such nos. - 9 years agoHelpfull: Yes(1) No(0)
- 491=3!
326=3!
263=3!
292=3!/2!
343=3!/2!
661=3!/2!
so total is 25
- 9 years agoHelpfull: Yes(0) No(2)
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