Answer :

frika

Write all numbers that are less than 60 and greater than 55:

56, 57, 58, 59.

Add the digits in these numbers:

1. 56 {5+6=11};

2. 57 {5+7=12};

3. 58 {5+8=13};

4. 59 {5+9=14}.

Answer: 58

fichoh

Using trial by error evalution on the values which lies within the interval given, the number which satisfies the condition is 58.

Using trial by error method :

The numbers while lies in the interval 55 < X < 60 are ; 56, 57, 58 and 59

Taking the sum of the digits :

  • 5 + 6 = 11
  • 5 + 7 = 12
  • 5 + 8 = 13
  • 5 + 9 = 14

The only value whose digits sums up to 13 is 58.

Therefore, the number whicj lies within the interval and gives a sum of 13 is 58.

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