Numbers 1-30

Complete the sequence:

one - two - three - ____?

• forty

• fourteen

• four

five - six - seven - ____?

• eighty

• eight

• eighteen

nine - ten - eleven - _____?

• twenty

• twelve

• thirteen

13 - 14 - 15 - ____?

• six

• seventeen

• sixteen

17 - 18 - 19 - ____?

• twelve

• twenty

• ten

21 - 22 - 23 - ___?

• twenty-six

• twenty-five

• twenty-four

twenty-six / ______?

• twenty-seven

• twenty-four

• twenty-three

twenty-eight / twenty-nine / _____ ?

• twenty-seven

• thirteen

• thirty

2-by-2 sequence:

two - four - six - ___?

• eight

• one

• seven

3-by-3 sequence:

six - nine - twelve - ___?

• ten

• fifteen

• three