twinnumbers
nounUK /ˈtwɪn ˈnʌmbəz/
US /ˈtwɪn ˈnʌmbərz/
Twin numbers are two numbers that are the same or go together like a pair.
The twin numbers 4 and 4 look exactly alike on the page.
OTHER MEANINGS
2. Two numbers that add up to a special total, like 5 and 5 making 10.
Five and five are twin numbers that make ten together.
3. Two numbers that are next to each other, like 6 and 7.
Six and seven are twin numbers sitting side by side on the number line.
4. Two numbers that look the same when flipped, like 69 and 96.
Sixty-nine and ninety-six are twin numbers that flip around.