Data Interpretation MCQs for MDCAT Practice

Science Reasoning section, Data Interpretation chapter. Sample questions from past PMC papers.

1. Question 1
   A jar contains 10 red marbles and 30 green ones. How many red marbles must be added to the jar so that 60% of the marbles will be red?
   • A.25
   • B.30
   • C.35
   • D.40
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
2. Question 2
   In a restaurant recently, I received the following bill:Starter $7.00Main Course $20.75Dessert $9.75Drink$4.50Service Charge $5.25TOTAL$47.25What percentage of the cost of the food and drink had been added to the bill as service charge?
   • A.11.1%
   • B.12.5%
   • C.14.0%
   • D.15.0%
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
3. Question 3
   A bead seller arranged some beads in a multi-layer box. The first layer of the box was square shaped with 4 rows and 6 columns. Each layer was 1 less in each dimension of the previous layer. What will be the maximum number of beads that could have been in the third layer from the first?
   • A.4
   • B.8
   • C.15
   • D.24
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
4. Question 4
   The skeleton of a mammoth was recently recovered from a permafrost mine in the United States. Analysis of the elements in the mammoth showed 1/32th of the expected levels of the carbon-14 isotope. If the half-life of carbon-14 may be considered to be 5730 years, how many years ago did this mammoth exist?
   • A.5,730 years
   • B.11,460 years
   • C.32,300 years
   • D.28,650 years
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
5. Question 5
   There are some marbles kept in a jar. One distinct positive integer is labeled on each ball. A number divisible by 4 is written on only 6 marbles. A number divisible by 3 is written on only 10 marbles. A number divisible by 12 is written on only 4 marbles. What is the smallest possible number of marbles in the bucket?
   • A.10
   • B.12
   • C.16
   • D.20
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
6. Question 6
   Many people were worried when they found that their photocopiers had been sometimes changing numbers on one photocopy; sometimes, although not always, changed 6 into 8.A list of prices was copied on this photocopier. The first five prices on the copy are shown below.$54.80$60.00$65.40$70.80$78.20In the original list, the prices had increased by the same amount each time.What was the next price on the original list?
   • A.$81.60
   • B.$81.80
   • C.$83.60
   • D.$85.60
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
7. Question 7
   A question-master asks each of four contestants up to 15 questions. The process is repeated again for a second round. The 'score' is the number of questions answered correctly. The scores after each round are announced in ascending numerical order.After the first round of a contest the scores were 8, 10, 11, and 14.After the second round the total scores for the contestants were 13, 18, 20, and 24.What was the largest possible score achieved in the second round of this contest?
   • A.10
   • B.11
   • C.14
   • D.16
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
8. Question 8
   This morning I took my three children to an internet cafe. Jay used the internet for 37 minutes and was charged $17.40, whilst Kay's 56 minutes cost $20.25 and Harry had to pay $19.05 for the 48 minutes that he spent online.Which of the following formulae does this cafe use to charge for its internet facilities?
   • A.$8.65 + $0.30 per minute
   • B.$8.15 + $0.25 per minute
   • C.$9.05 + $0.20 per minute
   • D.$11.85 + $0.15 per minute
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.