SELECT 
  (SELECT 
    MAX(`word_id`) 
  FROM
    `tbl_user_words` 
  WHERE `member_id` = 1) AS max_id,
  (SELECT 
    COUNT(`word_id`) 
  FROM
    `tbl_user_words` 
  WHERE `right_count` < 5 
    AND `member_id` = 1) AS num ;

SELECT MAX(`word_id`) AS max_id, SUM(`right_count` < 5) as num
FROM `tbl_user_words` 
WHERE `member_id` = 1;