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-999 or +999
The square root of 999 is an irrational number and it is about 31.60696126
999 999. 1 million and 2 million aren't counted. It is only the number inbetween. so from 1000001, 1000002,.........1999998, 1999999 which is 999 999 numbers
9999 is the 4-digit number and 999 is the 3-digit number.
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.