BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Exponent Question--GMAT Prep

Expert replies
Source: — Problem Solving |

by RM » Sat Jul 28, 2007 10:09 am
You can factorize the equation to its prime factors.

5^21 x 4^11=2 x 10^n
5^21 x 2^22 = 2 x 2^n x 5^n
5^21 x 2^22 = 2^(n+1) x 5^n

We can equate powers of either prime factor 2 or 5.

i.e. 5^21 = 5^n, gives n = 21
Or, 2^22 = 2^(n+1), gives n = 21
Join the discussion

thanks.

by mindruna » Sat Jul 28, 2007 10:31 am
That's so clear. Thank you so much.
Join the discussion

by marvelxx35 » Mon Jul 30, 2007 6:20 am
when given 5^21 * 4^11 = 2 * 10^n,

simplify 4^11 to 2^22 to get, 5^21 * 2^22 = 2 * 10^n.

then, simplify again to get, 10^21 * 2 = 2 * 10^n.

you can clearly see that n = 21.
Join the discussion