How many seven-digit numbers that do not contain the digits 2 or 9 are there? Pick:
A) 178546
B) 44786544
C) 435786
D) 1599678
E) 1835008
We can have 7 digits ( 1,3,4,5,6,7,8) for the first place ( million's place).   and similarly 8 digits for hundred thousands, ten thousands, thousands, hundred's, tenth's and unit digit. ( 0,1,3,4,5,6,7,8)   So in total 7*8*8*8*8*8*8= 
<gadget id="calculator">7*8*8*8*8*8*8</gadget>
<output>1_835_008</output>
1835008   Hence 1835008
<result>E</result>
How many seven-digit numbers that do not contain the digits 2 or 9 are there?