Practice30Create account

What is the two-digit number? Statement I: Its tens digit is twice its units digit. Statement II: The sum of its digits is 12.

Competition practiceData Sufficiency
  • AStatement II alone is sufficient but Statement I alone is not
  • BEither statement alone is sufficient
  • CStatement I alone is sufficient but Statement II alone is not
  • DBoth statements together are needed (neither alone is sufficient)

Step-by-Step Solution

I alone allows 21, 42, 63 or 84; II alone allows 39, 48, 57, 66, 75, 84, 93. Together: and , so and the number is 84. Both are needed.
Answer: D) Both statements together are needed (neither alone is sufficient)

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

What does 'ka' stand for in a certain code language? Statement I: 'ka la' means 'red…What is Sunil's present age? Statement I: Sunil's age 10 years from now will be twice…How is X related to Y? Statement I: X is the son of Z. Statement II: Z is the father of Y.In which direction is town M from town N? Statement I: Town N is to the south-west of…What is the value of X? Statement I: X squared equals 49 and X is positive. Statement…