--instructions--

This task doesn't have audio. Fill in the next number according to the pattern.

--fillInTheBlank--

--sentence--

五十一 (wǔ shí yī)，六十一 (liù shí èr)，BLANK, 八十一 (bā shí yī)

--blanks--

七十一 (qī shí yī)

--feedback--

The first, second and fourth number are 51, 61, and 81. The sequence goes up by 10 each time, so the third number is 七十一 (qī shí yī) (71).

--explanation--

五十一 (wǔ shí yī) is 51, 六十一 (liù shí yī) is 61, and 八十一 (bā shí yī) is 81. The whole sequence is formed by each number going up by 10, so the third number is 七十一 (qī shí yī) (71).