GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Identical blocks are stacked in rows to create a tower 24 ro
[#permalink]
12 May 2020, 06:25
12 May 2020, 06:25
2
Expert Reply
00:00
Question Stats:
73% (02:01) correct
26% (02:50) wrong based on 56 sessions
Hide Show timer Statistics
Identical blocks are stacked in rows to create a tower 24 rows tall. If the top row of the tower consists of four blocks, and each row below the top row consists of eight more blocks than the row directly above it, how many blocks are in the entire tower?
Show: :: OA
2304
Re: Identical blocks are stacked in rows to create a tower 24 ro
[#permalink]
12 May 2020, 06:25
12 May 2020, 06:25
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Re: Identical blocks are stacked in rows to create a tower 24 ro
[#permalink]
12 May 2020, 09:57
12 May 2020, 09:57
1
It is an AP
4, 12, 20, 28 .... (24 terms)
Sum = (24/2)*[2*4 + (24-1)*8] = 12 * [8 + 23*8] = 12*8*24 = 2304
4, 12, 20, 28 .... (24 terms)
Sum = (24/2)*[2*4 + (24-1)*8] = 12 * [8 + 23*8] = 12*8*24 = 2304
