Logic Puzzles and Deduction

8 questions · Staff Pick

All cats are mammals. Whiskers is a cat. What can we conclude?

✓Whiskers is a mammal

All mammals are cats

Whiskers is a dog

Nothing can be concluded

If today is Tuesday, what day was it 3 days ago?

Friday

✓Saturday

Sunday

Monday

A bag has 3 red and 2 blue balls. You pick one without looking. Which colour are you most likely to pick?

Blue

✓Red

Equal chance

Cannot tell

There are 5 people in a line. Ana is behind Bob, and Bob is behind Cara. Cara is first. Who is last?

Ana

Bob

Cara

✓Cannot tell without more information

If A → B and B → C, what can we conclude?

C → A

✓A → C

B → A

None of these

I am thinking of a number. If I double it and add 4, I get 20. What is the number?

✓8

Which statement is a fact rather than an opinion?

Pizza is delicious

Dogs are better than cats

✓Water boils at 100°C

Summer is the best season

Five friends stand in a row. Dan is not at either end. Eve is next to Dan. Ben is at one end. Who could be next to Ben?

Dan

Eve

✓Someone other than Dan or Eve

It is impossible to tell