Let a, b, c be distinct digits. Consider a two-digit number ‘ab’ and a three-digit number ‘ccb’, both defined under the usual decimal number system, if (ab)2= ccb > 300, then the value of b is
Select:
A) 1  B) 0  C) 5  D) 6  E) 7
Explanation :   Given , (ab)2 = ccb.   [ Only 1 , 5 and 6 on squaring will result with same digits in units place. ]   Taking a =2, b =1,   =&gt; (21)^2 = 441 &gt; 300.   Hence, the required value of b = 1   1nswer : 1
<result>A</result>
Let a, b, c be distinct digits. Consider a two-digit number ‘ab’ and a three-digit number ‘ccb’, both defined under the usual decimal number system, if (ab)2= ccb > 300, then the value of b is