How many six digit phone numbers can you frame using the digits from 0 to 9 if a condition restricts you to start the number with 35 and another condition restricts you from using any digit more than once?
Choices:
A) 1580 B) 1680 C) 1648 D) 1782 E) 1845
as the first two digits are fixed and on remaining 4places we can use only one at a time.this means on third place we can use any digit from 0,1,2,4,6,7,8,9. which means we can choose any of 8digits. similarly on 4th place any 7digits n so on..   thus   1*1*8*7*6*5= 
<gadget id="calculator">  1*1*8*7*6*5</gadget>
<output>1_680</output>
1680   ANSWER:1680
<result>B</result>
How many six digit phone numbers can you frame using the digits from 0 to 9 if a condition restricts you to start the number with 35 and another condition restricts you from using any digit more than once?