Must Know
v10.0.0 · 69.9 MB · code 100001
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File information
UpdatedMar 17, 2026
PublishedNov 10, 2020
Packagecom.interactiveworks.mhemustknow
Versionv10.0.0 (100001)
Size69.9 MB
MD5196a0db24c0349cdbb889a1dc3838c7b
Min SDK23
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA1C5:30:A7:D5:B3:17:54:F8:2C:DE:41:5B:09:ED:C4:6E:B4:23:23:1B
SignerCN=Patrick Geiger, OU=Interactive Works, O=Interactive Works, L=Chicago, ST=IL, C=US
Total downloads1,000
This version1,000
DeveloperMcGraw-Hill Professional
Age ratingEveryone
What's new in v10.0.0
High School Grammar and Composition are now included in the app.
Security scan
TRUSTED
- Developer signature verified 2024-05-19
- Signature SHA1 C5:30:A7:D5:B3:17:54:F8:2C:DE:41:5B:09:ED:C4:6E:B4:23:23:1B
- File MD5 196a0db24c0349cdbb889a1dc3838c7b
How to install Must Know v10.0.0 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 69.9 MB of free storage.
- Grab com.interactiveworks.mhemustknow_100001.apk — hit the Download button above (69.9 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 196a0db24c0349cd…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.interactiveworks.mhemustknow_100001.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=Patrick Geiger, OU=Interactive Works, O=Interactive Works, L=Chicago, ST=IL, C=US. 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 Must Know — tap Open on the install screen, or find the Must Know icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Must Know
- "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 6.0 Marshmallow 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.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.