The value of 210 factorial is:
10582362029223656378427428424334835305758990578716901956235273752
21444875324002101478493690117146739547682653165778925282737606261
89481169051055226066650741189573897273684791411180134039439160066
56189583850100081771168262572567047761626759866125919497564602974
95462825943562173740975441535894820208917507747350125583134608468
24864172030239122128896000000000000000000000000000000000000000000
000000000.
This number has 399 digits.
210.
210 of them.
9
Answer: 44,100 ft² = 1.01239 acres
Since the digits of 210 add up to 3, and that is divisible by 3 then 210 is divisible by 3. This works for 3, 9, and 27.
15 or 35
Answer: 210 mi. = 337.962 km
If they can be repeated, 343 different numbers. If they can be used once each, there are only 210.
The number is 35.
10C6 = 10*9*8*7/(4*3*2*1) = 210 combinations.
Ten different digits can be used to make 10C4 = 10*9*8*7/(4*3*2*1) = 210 four-digit numbers. Either numbers starting with 0 are permitted or the 10 digits do not contain a 0.
430 miles long and 210 miles wide