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Numerical
Hard
MM

Mental Arithmetic (scales eql)

Fast maths, no calculator

cut-e's scales eql: each equation has a missing value shown as a box (□) — choose the digit that makes it true. It adapts as you go: easy items are addition, harder ones add multiplication and larger numbers, and the hardest have two boxes. Five speeded minutes, no calculator.

Duration
~5 min
Length
Speeded set
Difficulty
Hard

This test is part of Pro.

What to expect

  • Equations with a missing value shown as a box.
  • Difficulty that rises and falls with your accuracy.
  • A running clock — as many as you can in five minutes.

What it measures

  • Mental calculation at speed
  • Number sense and estimation
  • Accuracy under a countdown

Instructions

  1. 1Tap the digit (1–9) that fills the box to make the equation true, then Submit.
  2. 2Tap a filled box to clear it; the hardest items have two boxes to fill.
  3. 3Estimate first to catch slips, and bank the easy ones fast.

Tips

  • Round to sanity-check every answer.
  • Drill times tables and simple fractions until they're cold.
Format: Fill-the-box equations · adaptive · 5 min