Divisibility & Fractions

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Across
  1. 2. A number that divides another number 'evenly' (= with no remainder).
  2. 4. A number is --- by three if the sum of its digits is --- by three.
  3. 6. You can --- a fraction by replacing the numbers by smaller ones while making sure it is an equivalent one.
  4. 7. The number above the line in a fraction.
  5. 8. The number below the line in a fraction.
Down
  1. 1. Highest --- Factor can be found by finding all factors of two numbers and selecting the largest one that is a factor of both numbers.
  2. 3. A number that only has two factors (one and itself).
  3. 5. An example of an --- fraction is 3/2. A 'non-example' of an --- fraction is 5/7.