How many of the Lord's prophets did Obadiah hide from Jezebel?

Answer: 100

Obadiah hid a hundred prophets in two caves, fifty in each.

“for when Jezebel had slaughtered the prophets of the LORD, Obadiah had taken a hundred prophets and hidden them, fifty men per cave, providing them with food and water.)”— 1 Kings 18:4 (BSB)