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In Algebra

Maria has three children There is two years age difference between each child The total ages of all three children is 36 years Rosa is the youngest child How old is Rosa?

Rosa is 10.   -- further--   This is calculated by working out the relationship between the children.   Let's call Rosa "R" and let that stand for her age.   The (MORE)
In Science

The sum of the ages of three children is 32 The age of the oldest is twice the age of the youngest The ages of the two older children differ by three years What are the ages of the three children?

The youngest child is x years, and the oldest is 2x. The difference between the two older children is three years, thus 2x-3. Now put it together: x (youngest) + 2x (oldest) + (MORE)

Why is the usage of the internet bad for children under twelve years of age?

The Internet is like a large city. There are libraries, museums, schools and harmless play areas. There are also the seedier sides of town, with rapists, murderers, con-arti (MORE)