It depends on what you want to do.
Chat with our AI personalities
io dont know
9+8+7+65+4+3+2+1 = 99. So 7 addition signs need to go in 987654321 to get a total of 99.
987654321 is the highest nine-digit number with no repeated digits.
9 + 8 + 7 + 65 + 4 + 3 + 2 + 1 = 99, so 7 plus signs.
Nope it's Composite because the sum of digits is divisible by 3.