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1. Helen is currently is 8 years old.

   How to solve world problem ?

   Endeavor to understand the question, analyze it and interpret it into equation.

   Given that Helen’s age is multiples of 4. Next year it’ll be a multiple of 3. Helen’s older brother is now 19.

   This means Helen current age is multiple of 4 and next year it will be a multiple of 3. Also, Helen’s age is less than 19

   The two available numbers that fit this analysis and less than 19 are 8 and 9. 8 is multiple of 4. 8 + 1 = 9 which is multiple of 3

   Therefore, Helen is 8 years old now

   Learn more about Arithmetic here: https://brainly.com/question/6561461

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