Math Tricks: Mental Math

Name: Math Tricks: Mental Math
Availability: InStock
Author: ANTONI

v2.99 · 9.9 MB · code 299

f52585084846243c6c3b36eb46d838c3 TRUSTED

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UpdatedApr 20, 2026

PublishedJul 27, 2020

Packageexample.matharithmetics

Versionv2.99 (299)

Size9.9 MB

MD5f52585084846243c6c3b36eb46d838c3

Min SDK21

Malware scanTRUSTED

Signature SHA1B0:4F:4C:8B:D3:EA:E0:1A:AD:B3:DF:72:E4:DF:6F:38:74:6D:F0:6A

SignerCN=Antoni Ion

Total downloads10,000,000

This version10,000,000

DeveloperANTONI

Age ratingEveryone

Added Leaderboards

TRUSTED

Takes about 2 minutes. You'll need roughly 9.9 MB of free storage.

Grab example.matharithmetics_299.apk — hit the Download button above (9.9 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
(Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches f52585084846243c…. Any difference means the file is corrupted or tampered — delete and re-download.
Open the APK — tap the download notification, or find example.matharithmetics_299.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
Check the signer — the install screen will name the publisher. For this build it should read CN=Antoni Ion. If it doesn't match, cancel — you have the wrong file.
Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
Done — open Math Tricks: Mental Math — tap Open on the install screen, or find the Math Tricks: Mental Math icon in your app drawer.

Common install errors for Math Tricks: Mental Math

"App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
"Parse error" — the APK is for a newer Android than yours. This version needs Android 5.0 Lollipop or later. Pick an older build from the versions list below.
"There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.