How many integers from 100 to 800, inclusive, remains the value unchanged when the digits were reversed?  Choose the correct option:
A) 50
B) 60
C) 80
D) 70
E) 90
question is asking for palindrome   first digit possibilities - 1 through 7 = 7   8 is not possible here because it would result in a number greater than 8 (i.e 808 , 818..)   second digit possibilities - 0 though 9 = 10   third digit is same as first digit   =&gt;total possible number meeting the given conditions = 7 *10= 
<gadget id="calculator">7 *10</gadget>
<output>70</output>
70   Answer is 70.
<result>D</result>
How many integers from 100 to 800, inclusive, remains the value unchanged when the digits were reversed?