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Earn +20 ptsQ: How many 7- digit numbers are there?
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Continue Learning about Math & Arithmetic
How many two digit whole numbers are increased by 18 when their digits are reversed?
7 two-digit numbers.
How many distinct 4-digit numbers have a digit sum of 7?
-3
How many 2-digit numbers contain the digit 7 only once?
-5
How many three-digit numbers are divisible by 7 or 5?
There are 282 such numbers.
How many two digit numbers are divisible by 7?
13
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