Latest Others Aptitude Question SOLUTION: How many 5 digit no. can b formed wit digits 1, 2, 3,4,5,6 which r divisible by 4 and digits not repeated. please tell steps

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How many 5 digit no. can b formed wit digits 1, 2, 3,4,5,6 which r divisible by 4 and digits not repeated.
please tell steps

Asked In Others Naveen (14 years ago)

Solved C.T.Narayanan Read Solution (2)

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C.T.Narayanan  (14 years ago) Best Solution

192

last 2 digits are 12,16,24,32,36,52,56,64 = 8 ways

reamining 3 digits in 4*3*2 ways

total = 4**3*2*8 = 192 ways

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Kavita kumari  (9 years ago)

Well here is the solution:-Take 5 blanks _ _ _ _ _.
Since the number has to be divisible by 4 we can have only the following cases
12,16,24,32,36,52,56,64.That is you can fill the last two blanks in eight ways.
Now take the first three blanks.Since we already selected 2 numbers,we are left with 4 numbers.
That is we can fill the first blank in 4 ways,similarly the second in 3,the third in 2 ways.
By fundamental principle of counting we have to multiply all of them.
That is 4 x 3 x 2 x 8=192.

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