Age Rating
4+
Apps in this category do not contain restricted content.
9+
Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.
12+
Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.
17+
You must be at least 17 years old to access this App.
Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

About Triangle Sum

Triangle Sum is a number logic puzzle game. Players need to fill in missing numbers so that each cell equals the sum of the two adjacent cells above it.

How to Play
In the triangular grid, each row's numbers are derived from adding adjacent numbers in the row above. Players must use logical reasoning and mathematical calculation to find the correct values for all empty cells. Each puzzle has a unique solution.

Game Modes
Classic Mode: Complete 10 questions with progressively increasing difficulty, one mistake ends the game
Timed Mode: Solve as many puzzles as possible in 120 seconds, consecutive correct answers earn time bonuses
Endless Mode: Challenge for the highest score with 5 mistakes allowed
Daily Challenge: One puzzle per day to test your solving skills

Difficulty Levels
Easy: 5-6 row triangles, number range 1-9
Normal: 7-8 row triangles, number range 1-12
Hard: 9 row triangles, number range 1-15
Expert: 10 row triangles, number range 1-20

Features
Hint system provides clues when you encounter difficulties
Combo system rewards consecutive correct answers
Clean interface design focused on the solving experience
Complete game records and statistics tracking

Target Audience
Triangle Sum is suitable for players who enjoy number puzzles, logical reasoning, and mathematical challenges. Whether for a brief casual break or intensive mental training, the game offers engaging entertainment.
Show More

What's New in the Latest Version 1.2

Last updated on Dec 1, 2025
Old Versions
Fixed the bug that prevented some users from entering the game
Show More
Version History
1.2
Dec 1, 2025
Fixed the bug that prevented some users from entering the game

Triangle Sum FAQ

Click here to learn how to download Triangle Sum in restricted country or region.

Triangle Sum Alternative