What is the two-digit number whose first digit is a and the second digit is b?. The number is greater than 9.
I.The number is multiple of 51.
II.The sum of the digits a and b is 6. Choices:
A) I alone sufficient while II alone not sufficient to answer	B) II alone sufficient while I alone not sufficient to answer	C) Either I or II alone sufficient to answer	D) Both I and II are not sufficient to answer	E) Both I and II are necessary to answer
Explanation:   From statement I:   A two digit number, greater than 9 and multiple of 51 should be 51 itself.   Because, 2 x 51 = 102 (3 digit number). Therefore, I alone sufficient to answer.   From statement II:   A two digit number, greater than 9 and sum of the digit is 6.   It can be 15, 24, 33, 42, 51. So we cannot determine the required answer from the statement II alone.   Thus, I alone give the answer while II alone not sufficient to answer.   Option I alone sufficient while II alone not sufficient to answer
<result>A</result>
What is the two-digit number whose first digit is a and the second digit is b?. The number is greater than 9.
I.The number is multiple of 51.
II.The sum of the digits a and b is 6.