Skip to main content
All Questions

For every integer from 0 to 10^100 - 1, take the product of its non-zero digits, counting the product for 0 as 1. What is the last digit of the sum of these products?

Unlock detailed company stats for this questionUpgrade

Community answers

No answers contributed by the community yet.

Related questions

An integer is chosen at random from 1 to one million. What is the probability it contains the digit 7 at least once?

Related courses

Course

SQL Interview Prep Course

Prepare for SQL interviews with lessons on joins, aggregations, and window functions, then practice real SQL interview questions in an interactive editor with expert solutions.

Course

Data Science Interview Prep

Land your dream data science role at Google, Amazon, Microsoft, Meta, Apple, and other top companies. Learn from mock interviews, frameworks, and advice from senior candidates. Practice statistics, experimentation, coding, SQL, machine learning, behavioral interviews, and more.