The number of positive integers which can be formed by using any number of digits from 0,1,2,3,4,5 without repetition. Choose the correct option
A) 1200 B) 1500 C) 1600 D) 1630 E) None
Solution: One digit positive numbers = 5.   Two digit positive numbers = 25.   Three digit positive numbers = 100.   4 digit positive numbers = 300.   5 digit positive numbers = 600.   Six digit positive numbers = 600.   Total positive numbers,   = 5+25+100+300+600+600= 
<gadget id="calculator">5+25+100+300+600+600</gadget>
<output>1_630</output>
1630.   Answer: Option 1630
<result>D</result>
The number of positive integers which can be formed by using any number of digits from 0,1,2,3,4,5 without repetition.