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when i am rounded to the nearest ten, i am 80. the sum of my two digits is 15. what number am i?

When I am rounded to the nearest hundred, i am 400. The digit in my tens place is 4 more than the digit in my hundreds place. The digits in my hundreds place and ones place are the same. What number am I ?

"the sum of my two digits is 15" ---->
the number can only be one of
78 87 69 96

Which of those would round off to 80 ?

78

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