How many three digit numbers can having only two consecutive digits identical is	Choices
A) 153 B) 162 C) 168 D) 163 E) None of these
When 0 is the repeated digit like   100, 200, ...., 9 in number   When 0 occurs only once like   110, 220, ....., 9 in number   When 0 does not occur like   112,211, ....., 2 × (8 × 9) = 144 in number.   Hence, total = 9 + 9 + 144= 
<gadget id="calculator">9 + 9 + 144</gadget>
<output>162</output>
162.   Answer 162
<result>B</result>
How many three digit numbers can having only two consecutive digits identical is