べききゅうすう【冪級数】
a power series
ほうていすう【法定数】
a quorum
ほうていとくひょうすう【法定得票数】
the minimum number of votes required by law for a person to be elected (to public office)
ほうにちきゃくすう【訪日客数】
the number of foreign visitors to Japan
ほすう【歩数】
the number of steps歩数を数えるcount one's steps歩数計a pedometer
ほんすう【本数】
大阪行き列車の１日の本数the number of Osaka-bound trains per dayあの線は本数が多い［少ない］Trains run [don't run] very fre...
ぼうちょうけいすう【膨張係数】
an expansion coefficient; expansion ratio
まいすう【枚数】
はがきの枚数を数えるcount the (number of) postcards
まかず【間数】
the number of roomsその家は間数が六つだThat house has six rooms.／It's a six-room house.
みちすう【未知数】
I〔数学で〕an unknown (quantity)II〔まだ分からないもの〕彼の実力は未知数だHis ability is still unknown.
