This is the "KUKU" app to study the Multiplication table. The answer form of questions is two alternatives. It is easy to study for preschool or school children. Because this app have "QUESTION VOICES" and "ANSWER VOICES" ( in English and Japanese ), it is possible to memorize it with your ears. This "KUKU" app have a function of recording your results. The "Challenge" test is made weak questions. To challenge this test, you will overcome your weak points. [Usage] (1)Select the Table that you want to study. The "Challenge" test is made weak questions. (2)Select the correct answer after showing "Ready" on blackboard. if you want to listen then question voice again, tap "listen again" or blackboard. (3)When you select the correct answer, you will listen the "ding-dong" sound. and, when you select the incorrect answer, you will listen "buh-boo" sound. you can answer the next question to tap "next" button. (4)After you answer 9 questions, you will see the Result of questions. you will back to the first screen,when you tap "Back to the first" button.