Here are the answers and Cheats to Escape Room: Math Doors Door 52. If you need help with other levels check our Escape Room Math Doors Page.
Hint – A pair is equal to 2. Closely examine the pairs in the question
Solution – 977 100 pairs of animals i.e 200 animals 2 pairs to each animal i.e 4 to each : 200×4 = 800 800+200-23 animal died 1000-23 = 977