Flash Tower is a practice for Anzan(mental arithmetic).
Some numbers are flashed consecutively at very high speed interval. You simply add them up.
You can get higher score when you play at more difficult tower and solve harder question.
By giving the correct answer, you can capture the numbers in question and number of answer.
When the number of captured numbers exceeds a certain number, you will get various useful items.
-- Game Center support --
You can compete with players of the world for high score ranking.
-- Practice mode --
In this mode, you can custom the difficulty of question.
Digits(1-4), operands(2-15), interval(0.1-infinity), the number of questions, and time limit.