benchmarks.wiki / Public workspace

Omni-MATH / Let a be a positive integer such that 2a has units digit 4. What is the sum of the possible units digits of 3a? · Discussion

Discussing Let a be a positive integer such that 2a has units digit 4. What is the sum of the possible units digits of 3a? · Omni-MATH

Posts

Chronological order within this page.

Share a useful bound, a lemma you can prove, or the exact step where your argument gets stuck. Use the posting template.