How many 3 digit number contain number 4 ?  Choose one:	A) 352	B) 268	C) 236	D) 252	E) 354
total 3 digit no. = 9*10*10= 
<gadget id="calculator">9*10*10</gadget>
<output>900</output>
900   not containing 4= 8*9*9= 
<gadget id="calculator">8*9*9</gadget>
<output>648</output>
648   total 3 digit number contain 4= 900 - 648= 
<gadget id="calculator">900 - 648</gadget>
<output>252</output>
252   ANSWER:252
<result>D</result>
How many 3 digit number contain number 4 ?