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

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Target Test Prep · GMAT

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Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
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40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
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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
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Target Test Prep GMAT OnDemand

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30-14

Expert replies
Source: — Problem Solving |

by beny » Sat Aug 25, 2007 2:41 pm
Answer B:

a3 = a2 + 2*a1 = 1 + 2 = 3
a4 = a3 + 2*a2 = 3 + 2 = 5
a5 = a4 + 2*a3 = 5 + 6 = 11
a6 = a5 + 2*a4 = 11 + 10 = 21
a7 = a6 + 2*a5 = 21 + 22 = 43
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