startingnumber
nounUK /ˈstɑːtɪŋ ˈnʌmbə/
US /ˈstɑːrtɪŋ ˈnʌmbər/
The starting number is the first number you begin with when you count or play a game.
In the game, the starting number was ten, so we counted up from there.
OTHER MEANINGS
2. The number a sequence or list begins with before any changes are made.
The starting number of the list was one, and it went up to twenty.
3. The number used as the base when calculating a change or increase.
If your starting number is five and you add three, you get eight.
4. The first number shown on a scoreboard or counter at the beginning of an activity.
The scoreboard's starting number was zero before anyone scored.