Skip to content
Exit presentation

Number Play

Checkpoint: quick divisibility tests

Three questions on the new tests. Feedback comes as you answer, and you can retry any time.

A number ends in 640. The front digits are not known. Which of 2, 4, 5, 8 and 10 divide it?

The digits of 3,462 add to 15. Does 6 divide 3,462?

Which pair of tests shows that a number divides by 40?

0 of 3 answered

Jump to lesson

This track

  1. 0 Start here
  2. 1 Ten of one digit, plus the other
  3. 2 Three digits, reversed and subtracted
  4. 3 The test that alternates the signs
  5. 4 A check that misses some mistakes
  6. 5 When a letter stands for a digit
  7. 6 Painting a test on a hundred squares
  8. 7 From five examples to every number
  9. 8 The end of a number decides
  10. 9 Add the digits to test 3 and 6
  11. 10 Two tests that make one
  12. 11 Checkpoint: quick divisibility tests
  13. 12 The big picture
  14. 13 Track quiz

Other tracks