Practice30Create account

What is the digit in the units place of a certain two-digit number? Statement I: The sum of its two digits is 9. Statement II: The number is 45. Which statement(s) are sufficient to answer the question?

Competition practiceData Sufficiency
  • ABoth statements together are needed (neither alone is sufficient)
  • BStatement I alone is sufficient but Statement II alone is not
  • CStatement II alone is sufficient but Statement I alone is not
  • DEither statement alone is sufficient

Step-by-Step Solution

I (digit-sum 9) allows 18, 27, 45, 90, etc. with different units digits; II fixes the number as 45, units digit 5.
Answer: C) Statement II alone is sufficient but Statement I alone is not

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Data Sufficiency practice questions

More Data Sufficiency practice

How is Q related to P, given that Q is a female? Statement I: P is the brother of Q.…Pointing to a photograph, how is the man in the photograph related to Rahul? Statement…In which direction is the market from the hospital? Statement I: The hospital is to the…How far is the post office from Sameer's house in a straight line? Statement I: From his…How many students are there in Priyanka's class? Statement I: Priyanka is 9th from the…