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Daphne Dooley

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3y ago
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14y ago

19/91, 28/82, 37/73, 46/64, 55. Isn't that easy?

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Q: How many numbers are there up to 100 where the two digits add to 10?
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How many two-digit numbers have digits that add to thirteen?

Assuming you mean digits and not didgets, the answer is 6.


How many three figure numbers have digits that add up to seven?

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When you add the odd numbers from 1 to 20 total sum of 100 how you make the 5 digits of odd numbers so the total comes to 50?

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What is the percent of numbers whose digets add up to an odd number between one and one hundred?

Since we are talking for the sum of digits, then we are talking about 2-digit numbers between 1 and 100, which are 90 numbers (10 to 99). From these numbers only half of them satisfy the above condition, that is 45 numbers. So 50% of 2-digit numbers between 1 and 100 have an odd sum of their digits.


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