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28 COMSATS Logical reasoning questions with answers and explanations.
Printable worksheet with answer key
Sara, Hina and Maria sit in a row. Sara is not at either end, and Hina sits to the left of Maria. Who sits in the middle?
Correct answer: Sara
Sara is not at an end, so she must be in the middle.
All engineers are graduates. Ali is an engineer. Which conclusion follows?
Correct answer: Ali is a graduate
The first statement applies to every engineer, so it applies to Ali.
A shop gives a 10% discount on a bill above Rs 1000. Bilal buys goods worth Rs 1200. How much does he pay?
Correct answer: Rs 1080
The discount is 120, so he pays 1200 − 120 = 1080.
No fish can walk. Some animals are fish. Which conclusion follows?
Correct answer: Some animals cannot walk
The animals that are fish cannot walk.
A meeting is on a day after Tuesday and before Friday, and not on Thursday. On which day is it?
Correct answer: Wednesday
Only Wednesday is after Tuesday, before Friday and not Thursday.
A bus leaves every 20 minutes from 8:00. Fatima reaches the stop at 8:50. How long does she wait for the next bus?
Correct answer: 10 minutes
The buses leave at 8:40 and 9:00, so the next one is 10 minutes after 8:50.
If it rains, the match is cancelled. The match was not cancelled. Which conclusion follows?
Correct answer: It did not rain
If rain always cancels the match, no cancellation means no rain.
Ahmed is older than Zain, and Zain is older than Omar. Which statement must be true?
Correct answer: Ahmed is older than Omar
The ages are in the order Ahmed, Zain, Omar from oldest to youngest.
Some teachers are poets. All poets are readers. Which conclusion follows?
Correct answer: Some teachers are readers
The teachers who are poets are also readers.
A pen costs Rs 15 more than a pencil. Together they cost Rs 35. What does the pen cost?
Correct answer: Rs 25
The pencil costs Rs 10 and the pen costs Rs 25, and 10 + 25 = 35.
In a race, Omar finished before Asad but after Bilal. Who finished first?
All squares are rectangles. All rectangles have four sides. Which statement must be true?
Correct answer: All squares have four sides
The first two statements chain together.
A pipe fills a tank in 6 hours and another pipe empties it in 12 hours. With both open, how long does it take to fill the empty tank?
Correct answer: 12 hours
The net rate is 1/6 − 1/12 = 1/12 of the tank per hour.
Every number divisible by 6 is divisible by 3. The number 18 is divisible by 6. Which conclusion follows?
Correct answer: 18 is divisible by 3
The rule applies to every number divisible by 6.
Hina is taller than Sara, Sara is taller than Fiza, and Fiza is taller than Dua. Who is the second tallest?
Correct answer: Sara
The order from the tallest is Hina, Sara, Fiza, Dua.
What is the angle between the hands of a clock at 3:15?
Correct answer: 7.5°
The minute hand is at 90° and the hour hand is at 97.5°.
Some doctors are teachers. No teacher is a farmer. Which conclusion follows?
Correct answer: Some doctors are not farmers
The doctors who are teachers cannot be farmers.
Ali has twice as many marbles as Bilal. Together they have 36. How many marbles does Ali have?
Only members can enter the library. Zara entered the library. Which conclusion follows?
Correct answer: Zara is a member
If only members can enter, anyone who entered is a member.
A train leaves at 9:15 and the journey takes 2 hours 50 minutes. When does it arrive?
Correct answer: 12:05
Adding 2 hours gives 11:15 and 50 more minutes gives 12:05.
Every student in the class passed. Rana is in the class. Which conclusion follows?
Correct answer: Rana passed
The statement applies to every student in the class.
Three consecutive numbers add up to 45. What is the largest of them?
All teachers in the school are graduates. Nadia is a teacher in the school. Which conclusion follows?
Correct answer: Nadia is a graduate
The first statement applies to every teacher.
Five friends sit in a row. Ali is at the left end and Zara is at the right end. Bilal sits next to Ali. Who cannot sit at either end?
Correct answer: Bilal
Ali and Zara take the ends, so Bilal sits second.
If today is Friday, what day was it 10 days ago?
Correct answer: Tuesday
Ten days ago is one week and three days back, and Friday minus three days is Tuesday.
No bird is a mammal. All bats are mammals. Which conclusion follows?
Correct answer: No bat is a bird
Bats are mammals, and no mammal is a bird.
A shop sells pens at Rs 20 each. Sara buys 3 pens and pays with a Rs 100 note. How much change does she get?
The ages of Hira, Sana and Maha are all different. Hira is older than Sana, and Maha is younger than Sana. Who is the oldest?