Practice Course of Action MCQs for HEC HAT-4 (Biological / Medical / Physical Sciences) analytical reasoning — topic-wise sets with solved answers.
Q1. A factory's quality control team detects a defect in every 5th product. If they inspected 20 products, how many defects did they find?
Answer: 4
Explanation: Defects occur every 5th product, so at 5th, 10th, 15th, and 20th products, totaling 4 defects
Q2. A series of numbers is given as 2, 5, 8, 11, 14. What is the next number in the sequence?
Answer: 17
Explanation: The pattern adds 3 to each number to get the next number, so 14 + 3 = 17
Q3. A librarian arranges books on shelves such that the number of books on each shelf follows the sequence 3, 6, 9, 12. How many books will be on the 5th shelf?
Answer: 15
Explanation: The sequence increases by 3 each time, so for the 5th shelf, it will be 12 + 3 = 15
Q4. In a coding challenge, a programmer notices that the number of bugs reported follows a pattern: 1, 2, 4, 8. If the pattern continues, how many bugs will be reported on the 5th day?
Answer: 16
Explanation: The pattern doubles each time, so on the 5th day, it will be 8 * 2 = 16
Q5. A population of bacteria grows in a pattern: 100, 200, 400, 800. What will be the population after the next division?
Answer: 1600
Explanation: The population doubles each time, so after the next division, it will be 800 * 2 = 1600
Q6. A child is building a tower with blocks, following a pattern of 2, 5, 8, 11 blocks per layer. How many blocks will be in the 6th layer?
Answer: 17
Explanation: The pattern adds 3 each time, so for the 6th layer, it will be 11 + 3 + 3 = 17
Q7. In a game, the score doubles every level: 10, 20, 40, 80. What will be the score at the 5th level?
Answer: 160
Explanation: The score doubles each level, so at the 5th level, it will be 80 * 2 = 160
Q8. A sequence of letters is given as A, C, E, G. What is the next letter in the sequence?
Answer: I
Explanation: The pattern increments by 2 letters in the alphabet, so the next letter after G is I
Q9. A manufacturing plant produces parts in a sequence: 5, 10, 15, 20. How many parts will be produced on the 6th day?
Answer: 25
Explanation: The sequence increases by 5 each day, so on the 6th day, it will be 20 + 5 = 25
Q10. A series of symbols is given as *, **, ***, ****. What comes next in the sequence?
Answer: *****
Explanation: The pattern adds one more '*' each time, so the next sequence will have five '*'
Q11. In a certain code, the number of characters used to represent a number follows the sequence 2, 3, 5, 7. What will be the number of characters for the next number?
Answer: 11
Explanation: The sequence represents prime numbers, so the next prime after 7 is 11
Q12. A student notices that the number of students attending a study group follows a pattern: 4, 7, 10, 13. How many students will attend on the 5th day?
Answer: 16
Explanation: The pattern increases by 3 each day, so on the 5th day, it will be 13 + 3 = 16
Q13. A series of numbers is given as 1, 4, 9, 16. What comes next in the sequence?
Answer: 25
Explanation: The sequence represents square numbers, so the next square after 16 is 25
Q14. In a game, the player's power increases in a pattern: 2, 4, 8, 16. What will be the power at the 5th level?
Answer: 32
Explanation: The power doubles each level, so at the 5th level, it will be 16 * 2 = 32
Q15. A sequence of shapes has 3, 6, 9, 12 sides. How many sides will the next shape have?
Answer: 15
Explanation: The sequence increases by 3 each time, so the next shape will have 12 + 3 = 15 sides
Q16. A certain investment grows in a pattern: $100, $150, $225, $337.50. What will be the amount after the next growth period?
Answer: $506.25
Explanation: The investment grows by 50% each period, so after the next period, it will be $337.50 * 1.5 = $506.25
Q17. A pattern of numbers is 1, 3, 6, 10. What comes next in the sequence?
Answer: 15
Explanation: The sequence represents triangular numbers, so the next number is 10 + 5 = 15
Q18. A city's population grows in a pattern: 1000, 1200, 1440, 1728. What will be the population after the next growth period?
Answer: 2073.6
Explanation: The population grows by 20% each period, so after the next period, it will be 1728 * 1.2 = 2073.6
Q19. A series of numbers is 2, 6, 12, 20. What is the next number in the sequence?
Answer: 30
Explanation: The pattern increases by adding 4, 6, 8, and so on, so the next difference should be 10, making the next number 20 + 10 = 30
Q20. In a sequence, the numbers are 1, 2, 4, 8, 16. What is the pattern, and what comes next?
Answer: Doubling, 32
Explanation: The pattern doubles each time, so the next number is 16 * 2 = 32
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