Latest Infosys Aptitude Question SOLUTION: Find the number of 6 digit numbers consisting only of even digits

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(#M40013512) INFOSYS Logical Reasoning question Keep an EYE

Find the number of 6 digit numbers consisting only of even digits

Asked In Infosys praveen (12 years ago)

Solved Mayur Read Solution (4)

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Read Solution (4) :

Mayur  (12 years ago)

even digits are 0,2,4,6,8... as we normally consider 0 as even number.
number of 6 digit numbers consisting only of even digits= 4*5*5*5*5*5 = 4*3125 = 12500 as first digit can not be zero.

Is this solution Helpfull? Yes (63) | No (4)  

sourav  (11 years ago)

since it is already said it is a 6 digit number so the first digit can never be 0. moreover it is also said that all the digits are made by even digits. so digits used are 0,2,4,6,8.
now as 0 can't be used in the first place the first place can be filled by 4 ways. and the rest 5 places can be filled by 5 ways.(repeatations are allowed)
so the answer is 4*5^5.

Is this solution Helpfull? Yes (16) | No (3)  

Bhupendra Choudhary  (12 years ago)

even digits are 0,2,4,6,8 so
possibility for 0 =4
for 2=5
for 4=5
for 6=5
for 8=5
so final answer would be 4*5*5*5*5=2500

Is this solution Helpfull? Yes (5) | No (19)  

Abhradeep Ganguli  (11 years ago)

there are 5 even digits i.e 0, 2, 4, 6, 8 and 6 places, so the answer will be 4*5C4=20

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