What number range is used in dMAT Mathematical Equations questions?

Every unknown in a dMAT Mathematical Equations system is restricted to a whole number between 1 and 20, and this narrow, known range is one of the most useful facts you can walk into the exam with. It means fractional or negative results always signal an arithmetic mistake, not a valid answer.

Key Facts About the Number Range

How to Use the Range While Solving

• If a step in your working produces a fraction or a negative number, stop and recheck your algebra rather than writing it down as final, since it cannot be correct.
• Use the upper bound of 20 to sanity check large products; if a multiplication step implies a value above 20, you have likely misread an equation.
• Because you cannot take notes, do every substitution mentally in a fixed order so you do not lose track of which letter you have already solved.

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My Advice

Drill simple two-letter and three-letter systems mentally, out loud if it helps, until substitution feels automatic. The bounded 1 to 20 range is a gift the exam gives you for free, so make checking against it a reflex rather than an afterthought once you have an answer.