FactDrill
Settings
My setup
Zetamac
Zetamac defaults
Addition
(2–100) + (2–100)
Subtraction
addition in reverse
Multiplication
(2–12) × (2–100)
Division
multiplication in reverse
Your own setup is saved — tap “My setup” to go back to it.
Quick tables
× only
÷ only
× and ÷
2–12
6–9, 12
My 4 weakest
+ Add
− Subtract
Start
Untimed drill (weak facts)
Stats & heatmap
End
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9
Clear
0
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Drill my weak facts
Home
Stats
Done
× Mult
÷ Div
+ − Types
Tap a square for details.
Slowest facts
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Settings
Done
You’re in
Zetamac mode
, which always uses Zetamac’s defaults. Switch to
My setup
on the home screen to change tables and ranges.
Multiplication
Include multiplication
Tables
2–12
None
2–20
Times
from
to
Division
Include division
Same tables as multiplication
e.g. 7 table → 56 ÷ 7, 56 ÷ 8 style problems use divisor 7
Divide by
2–12
None
Answers from
from
to
Addition & subtraction
Include addition
Zetamac style: (2–100) + (2–100)
Include subtraction
Addition in reverse
range
to
Round
Custom length (seconds)
Focus on weak facts
The rest are random so you stay sharp on everything.
"Fast" target (seconds)
Facts slower than this count as weak and show red-ish
"Fast" target for + and − (seconds)
Adding and subtracting naturally take a bit longer
On-screen number pad
Off = phone keyboard
Auto-clear wrong answers
Wrong entry flashes red, then clears
Show tap counter
Debug: shows touches the phone sent vs keys counted
Theme
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