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Q: The sum of the digits of a two-digit number is 12 If the digits are interchanged the number is increased by 54 What is the original number?
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Dan found a twodigit odd number. one of its digits was half the other. the number was greater than 50. what was it?

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What two digit number are interchanged to form a new two-digit number?

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The sum of the digit of a 2 digit number is 11 when the digits are reversed the new number is increased by 20 which is twice the original number find the number?

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One way of doing this is through trial and error. Choose a random number where the digits add up to 14. There isn't that many, the numbers are:59 and 68. 5+9= 14. However 95 -59 is 36, twice as much as 18. 6+8=14. And 86-68 is 18. So the number is 68.


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Is 1 trillion 17 a prime number?

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Possibility of two digit no whose sum is 17 89 and 98 Reverse of 89 is 98. 98 is 9 less than the original no 89. 89 is original no