Statements: All students are teachers. Some teachers are professors. Conclusions: I. Some professors are students. II. Some teachers are students. MCQ with Answer and Explanation

Explanation:
From All books are pens and Some pens are erasers, the some pens that are erasers may or may not include books. So I does not follow. II is the conversion of the second statement and follows.

Explanation:
Subtractions are 5, 10, 15; next subtraction is 20. 70−20=50.

Explanation:
LION = 12+9+15+14=50. TIGER = 20+9+7+5+18=59.