Practice30Create account

Statements: Some keys are locks. No lock is a door. Conclusions: I. Some keys are not doors.
II. Some locks are keys. Which conclusion(s) follow?

Competition practiceSyllogism
  • AOnly I follows
  • BNeither I nor II follows
  • CBoth I and II follow
  • DOnly II follows

Step-by-Step Solution

The keys that are locks are not doors, so some keys are not doors; and 'some keys are locks' converts to 'some locks are keys'.
Answer: C) Both I and II follow

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Syllogism practice questions

More Syllogism practice

Two statements — All chairs are tables; Some tables are sofas — are followed by two…Statements: Some pens are books. All books are papers. Conclusions: I. Some pens are…Statements: No apple is an orange. All oranges are fruits. Conclusions: I. No apple is a…Consider: Some pens are erasers. Some erasers are sharpeners. Conclusions: I. Some pens…Which conclusion(s) follow from 'All lions are cats' and 'No cat is a dog'? I. No lion…