Latest TCS Aptitude Question SOLUTION: How many 4 digit number that do not contain 3 or 6 ?

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How many 4 digit number that do not contain 3 or 6 ?

Asked In TCS (10 years ago)

Unsolved Read Solution (6)

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ruksana h jamakhandi  (10 years ago)

0,1,2,4,5,7,8,9 are the numbers in four digit number we cant place 0 so the 7 numbers are use next 3 place we can use all 8 number so 7*8*8*8=3584

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Triloki Shaw  (10 years ago)

thousand digit filled by=7ways(excluding 0,3,6)
hundred digit=8ways
tenth=8ways
unit=8ways
total=7*8*8*8=3584

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DEEPAK SINGHAL  (10 years ago)

7*8*8*8=3584

Is this solution Helpfull? Yes (2) | No   

lavishpatodi  (10 years ago)

----
Th place shouldn't contain 0
therefore to fill this place we have -1,2,4,5,7,8,9 (7 ways )
for H place
we have -0,1,2,4,5,7,8(7 way)
for Tens place we have left with only 6 numbers
and for Ones place we left with 5 numbers only

therefore no of digits that do not contain 3 or 6 -
7*7*6*5=1470 digits

Is this solution Helpfull? Yes (1) | No (20)  

Utkarsha Singh  (10 years ago)

its not 3 and 4 . it is 3 0r 4
so two cases will be dere.

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Guru Pranav  (10 years ago)

7*8*8*8=3584

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