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Q: When the digits of a two digit number are reversed the new number is 36 more than the original number the units digit is twice the tens digit What is the original number?

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Any two digit number in which: (a) the units digit is not 0, and (b) the two digits are different will form a new 2-digit number when the digits are interchanged.

Not necessarily. Consider 444. The digits are not different. The first and second digits are not multiples of 3 The first digit is not greater than the second digit. In spite of all that, 444 is a 3-digit number

Six.

Any 5-digit number is greater than a 4-digit one.

No, reversing the order of the digits of a two-digit prime number does not always result in a prime number.

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83 A+

19

45

46.

The original number is 58.

45

45

45 and 54

To total 17 the two digits must be 8 and 9! The original number was 98.

98 and 89

the answer is 25 and then if you reverse that it is 52

The number is 36

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