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irakobra [83]
2 years ago
9

Isabel is thinking of an even number between 234 and 250 . The sum of the digits is double the digit in the ones place. What is

Isabel's number ?
Mathematics
1 answer:
Dvinal [7]2 years ago
4 0
Since the required number is between 234 and 250, then the first digit of the number is 2 and the second digit can either be 3 or 4.

Let the second and the third digits be x and y respectively, then

2 + x + y = 2y

Consider when the second digit is 3, then

2 + 3 + y = 2y
5 = y

Thus, the number is 235.

Similarly, consider when the second digit is 4, then

2 + 4 + y = 2y
6 = y

Thus, the number is 246.

Since the required number is an even number, therefore, Isabel's number is 246.
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