Odd Number
noun, の adjective
Odd numbers are odd numbers (as in, 1, 3, 5, 7, though they are a bit strange as well).
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
奇数を3才の子どもに説明するのは難しいです。
It's difficult to explain odd numbers to a three-year-old.
何故か奇数の月はイベントが多い気がします。
For some reason, I feel like there are more events in odd-numbered months.
参加者の数が奇数だから、ペアになってもらうには一人足りないね。
Because the number of participants is odd, we're one person short for pairing everyone up.
奇数とは2で割り切れない数字のことです。
Odd numbers are numbers that cannot be divided by two.