Perform arithmetic operations by adding, subtracting, or multiplying adjacent numbers and entering the last digit of the result. Complete 15-minute sessions with 5-minute breaks, followed by a 15-minute session.
by Takahide Kambe★ 4.819 ratingsEducationFreeData updated 2026-09-06
Cardiothoracic surgery self-assessment and review.
The app provides multiple-choice questions for cardiothoracic surgeons and trainees covering various disorders and diseases. Users can customize question evaluation and access optional AI-enhanced learning for contemporary clinical context.
Take an online language test to determine current proficiency. Set learning goals with a coach and AI. Practice speaking, listening, and writing through interactive exercises. Track progress over time. Receive feedback on performance.
Perform calculations with fractions, decimals, and repeating decimals using order of operations. Enter fractions with blue buttons for whole numbers and green buttons for numerators over denominators.
Learn and practice with problems ranging from 2 to 3 numbers. Each addend has 1 to 6 digits. Choose random or custom problems. Adjust tutorial animation speed. View step-by-step solutions with the play tutorial button.
Test color recognition by tapping "Blue Daruma" when the question is blue, despite "Blue" being displayed in red. Choose correct answers quickly in speedrun modes with 10, 20, or 30 questions. Track high scores and challenge world records.
The app helps users memorize multiplication tables up to 12x12. It offers exercise and test modes to practice and track performance, including correct answers, scores, and completion times.