Online Course Discussion Forum

MC I-C Finite Math Self-Paced Week 1

 
 
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MC I-C Finite Math Self-Paced Week 1
by Amy T - Sunday, 6 December 2020, 3:10 PM
 

I need help on this question:

Find the largest power of 2 that divides 2121212


thank u!!



 
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Re: MC I-C Finite Math Self-Paced Week 1
by Areteem Professor - Thursday, 10 December 2020, 10:55 AM
 

Remember the rule for divisibility for powers of $2$: $2^n$ divides a number if the number formed by its last $n$ digits is divisible by $2$. So a number is divisible by $2$ if its last digit is even, divisible by $4$ if the last two digits form a multiple of $4$, etc. So, does $2$ divide $2$? does $4$ divide $12$? does $8$ divide $212$?