VJesus12 Legendary Member View User Profile Posts: 2276 Joined: Sat Oct 14, 2017 6:10 am Followed by:3 members What is the unit's digit of \(a^{18}\)? by VJesus12 » Sat Nov 23, 2019 2:21 am What is the unit's digit of \(a^{18}\)? (1) \(a^2\) has a units digit of 9 (2) \(a^7\) has a units digit of 3 [spoiler]OA=D[/spoiler] Source: Veritas Prep Top Quote
