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What digit is the least frequent between the number 1 and 1000?
Assuming you mean in the numbers 1, 2, 3, ..., 998, 999, 1000 then the digit 0. (The digit 1 appears 301 times, the digits 2-9 all appear 300 times each, but the digit 0 only appears 192 times.)
How many integers between 1000 and 9999 inclusive does the digit 3 occur?
There are 3168 such numbers.
How many four digit no are there between 999 and 3000 through method?
All the numbers between 999 and 3000 are four-digit numbers. You need to subtract 3000 - 999 - 1. The extra -1 is to account for the fact that the numbers 999 and 3000, in this case, are not included.
What digit is the least frequent between 1 to 1000?
Zero (192 occurances), then 2 to 9 (all equal at 300), and then 1 (301).
How many numbers with 2 or 7 as the units digit are there between 10 and 1000?
In every 100 there are 10 numbers that have a units digit of 2 and 10 with 7, making 2 with 2 or 7. Between 0 and 1000 there are 10 hundreds, making 10 × 20 = 200 such numbers. BUT 2 and 7 are less than 10, so there are two less such numbers, making 200 - 2 = 198 such numbers.
