Number Gym

by ioncreature

HomeGamesMissing Number

Missing Number

Arithmetic

Download on theApp Store

How to play

An equation has one number replaced with "?". Figure out what it is. Requires reverse thinking — for example, in "? + 3 = 10" you need subtraction. All four operations (+, −, ×, ÷) unlock as level grows. At higher levels fractions (1/3 × ? = 4) and powers (?² = 49, √? = 7) appear.

Examples

? + 3 = 10  →  7
6 × ? = 42  →  7
?² = 49  →  7

Games

Speed Math Chain Calc Estimation Compare Dice Sum Target Sum Quick Convert Arithmetic Exam Number Memory Number Sort Number Reflex Cascade Eagle EyeNew Number Patterns Number Matrix Make 24 Number Maze Signal Gates Logic Circuit Mental RotationNew