How many 3 digit numbers can be made from the numbers 1,2,3,4,5,6,7,8,9,0 Choose one:
A) 1000
B) 720
C) 648
D) 500
E) 100
A3 digit number is made from (First Digit , Second digit, Third digit) ABC   For the first digit of the 3 digit numbers we have to choose from numbers 1,2,3,4,5,6,7,8,9 we cannot take 0 since it is a 3 digit number that we have to make   So the first digit can have 9 entries.   For the second digit we can have all numbers including 0 except one number which we used for first digit. So we have 9 choices (including 0)   For the third digit we have all numbers minus two digits which we used for A and B   So we have 8 choices.   Total ways by which we can form a 3 digit number are 9 * 9 * 8= 
<gadget id="calculator">9 * 9 * 8</gadget>
<output>648</output>
648   Answer: 648
<result>C</result>
How many 3 digit numbers can be made from the numbers 1,2,3,4,5,6,7,8,9,0