Data Sufficiency -1

Find the unit digits in (6ab)64 where a and b are the tens and unit digits of the number.
i. a*b = 24
ii. b greater than 4
Each question is followed by two statements, I and II. Answer each question using the following instructions
Choose 1 If the question can be answered by using one of the statements alone, but can not be answered by using the other statement alone.
Choose 2 If the question can be answered by using either of the statements alone
Choose 3 If the question can be answered by using both of the statements together, but can not be answered using either of the statements alone
Choose 4 If the question can not be answered even by using both the statements together
Theory is discussed in this video.
UPSC CSAT