13 M of N = 13 moons of neptune.
This ditloid is 5 = Number of Great Lakes.
13 Months in a Chinese Lunar Year It could also be Calendar instead of Chinese. This is calculated using a lunisolar calendar.
This is a Ditloid. The answer is 26 Miles in a Marathon. (approximately)
Go to google.com and type in the words ditloid answers.
This is a Ditloid. The answer is 13 Weeks to a Quarter.
3 Men and a Little Lady (It's the name of a movie.)
568 M in a P = 568 millilitres in a pint.
1993 the grand national that never was
4 musicians in a quartet
Millimetres in a Yard
The answer is '39 Inches in a Metre'.
13 Hearts in a Pack of Cards.