23. (FOR HIGH LEVEL 3) USE THE ANSWER OF PREVIOUS STEPS.

This knack is very important and frequent. When the problem consists of several small questions such as (1),(2), …, you have to think “Can I use something getting at previous steps?” This is very effective. Because the problem setters construct it by “small steps” for that the students can solve it. So, get on the leading.

See you next.

Nasuno Kumao