e

Questions with only **Addition** and **Subtraction** operators and **One-Digit** numbers will be displayed.

m

Questions with all **Arithmetic Operators** and **One-Digit** numbers will be displayed.

h

Same rules as **Medium** but the correct answer does not have a **Range Limit** (even negative numbers can be the answer).

i

Same rules as **Hard** but with **Two-Digit** number questions.