It wasn't possible last week and it still isn't possible for 6 odd numbers to add to an odd number, so...
Cheat! 3 + 3 + 3 + 1 + 11 = 21
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9999
10,000 (ten thousand) comes after 9999
Well, honey, to find the number of 4-digit multiples of 9, you just need to divide the largest 4-digit multiple of 9 (9999) by 9 and subtract the smallest 4-digit multiple of 9 (1008) divided by 9. So, 9999 ÷ 9 - 1008 ÷ 9 = 1111 - 112 = 999. That's right, there are 999 4-digit numbers that are multiples of 9.
10000. 0000 to 9999
Anything that has 4 digits - any number between 1000 and 9999.