TCS Company Numerical Ability Area and Volume

How many number of four digit numbers that do not contain 3 or 6 are there?
A.4096
B.3584
C.7200
D.5040

Read Solution (Total 2)

excluding 3 and 6 we will have 8 numbers to place in 4 places but we can not put 0 on 1st position so
= 7*8*8*8 =3584
10 years agoHelpfull: Yes(32) No(0)

7 8 8 8 =3584
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10 years agoHelpfull: Yes(0) No(1)

TCS Other Question

IN base 7,a number is written using the digit 0,1,6,the number 21 in base 7 is equal to 2*7+1=15 in base 10.similarly the number 135 in base 7 is 1x72+3x7+5=75 in base 10.what is the sum of base 7 numbers 1234 and 6543 in base 7?
A.10111
B.11101
C.11110
D.11011 Mr and Mrs smith have invited 9 of their friends and their spouses for a party at the waikki beach report.they stand for a group hotograph.if Mr smith never stand next to the Mrs smith(as he says there are always together otherwise),how many
ways the group csn be arranged in a row for the photograph.
A.2x19!
B.20!
C.18x19!
D.19!+18!