Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word:
You need to go for a drive to the public gardens, but you aren't going to get your normal car, you're going to get your other car. Your hoe car (ほか)! It's a car made entirely out of garden hoes. You can drive it and hoe with it at the same time! Your other car can't do that!
Any other questions?
It looked like the other students in the class weren't great.
Let’s throw these eggs at his house some other day.