Data Sufficiency Practice Questions
Questions: 15

Time: 30 minutes

Directions: Each question below is followed by 2 statements numbered (1) and (2). The questions have to be answered in terms of choices A to E. Mark your answer choice as;

  1. If Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
  2. If Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
  3. If BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
  4. If Each Statement ALONE is sufficient.
  5. If Statements (1) and (2) TOGETHER are NOT sufficient.
  1. It takes 3.5 hours for Mathew to row a distance of X km up the stream. Find his speed in still water.

    (1) It takes him 2.5 hours to cover the distance of X km downstream.

    (2) He can cover a distance of 84 km downstream in 6 hours.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  2. A man mixes two types of glues (X and Y) and sells the mixture of X and Y at the rate of $17 per kg. Find his profit percentage.

    (1) The rate of X is $20 per kg.

    (2) The rate of Y is $13 per kg.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  3. A bag contains 20 copper and 10 brass coins. If 9 of the coins are removed, how many copper coins are left in the box?

    (1) Of the removed coins, the ratio of the number of copper coins to that of brass coins is 2 : 1

    (2) Four of the first six coins removed are copper.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  4. Maria deposits $10,000 in a bank. What is the annual interest which the bank will pay to Maria?

    (1) The interest must be paid once every six months.

    (2) The rate of interest is 4%.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  5. Given that the length of the side of a square is l and that the length of the side is increased by x%. State whether the area of the square is increased by more than 10%.

    (1) x < 10 <10%

    (2) x > 5

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  6. People in a club either speak French or Russian or both. Find the number of people in a club who speak only French.

    (1) There are three hundred people in the club and the number of people  who speak both French and Russian is 196.

    (2) The number of people who speak only Russian is 58.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  7. Joe is older to Lloyd by five years. Ten years ago, John was 10 years older than Mary. What is Mary's age today?

    (1) Mary's age today is three times the age of Joe.

    (2) Lloyd today is 5 years old.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  8. A sum of $385 was divided among Jack, Pollock and Gibbs. Who received the minimum amount?

    (1) Jack received 2/9 of what Pollock and Gibbs together received.

    (2) Pollock received 3/11 of what Jack and Gibbs together received.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  9. 'n' is a natural number. State whether n (n² - 1) is divisible by 24.

    (1) 3 divides 'n' completely without leaving any remainder.

    (2) 'n' is odd.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  10. A policeman spots a thief and runs after him. When will the policeman be able to catch the thief?

    (1) The speed of the policeman is twice as fast as that of the thief.

    (2) The distance between the policeman and the thief is 400 meters.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  11. Who got the highest marks among Abdul, Baig and Chiman?

    (1)   Chiman got half as many marks as Abdul and Baig together got.

    (2)   Abdul got half as many marks as Baig and Chiman together got.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  12. Given that side AC of triangle ABC is 2. Find the length of BC.

    (1) AB is not equal to AC

    (2) Angle B is 30 degrees.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  13. 50% of the people in a certain city have a Personal Computer and an Air-conditioner . What percent of people in the city have a personal computer but not an Air-conditioner.

    (1) 60% of the people in the city have a Personal Computer.

    (2) 70% of the people in the city have an Air-conditioner.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  14. Bags I, II and III together have ten balls. If each bag contains at least one ball, how many balls does each bag have?

    (1) Bag I contains five balls more than box III.

    (2) Bag II contains half as many balls as bag I.

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.


  15. Given that (a + b)² = 1 and (a - b)² = 25, find the values 'a' and 'b'.

    (1) Both 'a' and 'b' are integers.

    (2) The value of 'a' = 2

    Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
    Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
    BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
    Each Statement ALONE is sufficient.
    Statements (1) and (2) TOGETHER are NOT sufficient.