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A grocer makes a display of cans in which the top row has one can and

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Math Expert
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A grocer makes a display of cans in which the top row has one can and  [#permalink]

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New post 21 Mar 2019, 23:23
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

85% (01:53) correct 15% (02:51) wrong based on 26 sessions

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Joined: 25 Feb 2019
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Re: A grocer makes a display of cans in which the top row has one can and  [#permalink]

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New post 21 Mar 2019, 23:51
1
1
IMO D

the given condition form an AP with first term as 1 and sum of all items in row = 100

difference = 2

S = n/2(2a+(n-1)*d)

Here we have to find n

after putting S = 100 n= ?
d=2 a= 1

we get n = 10

Award kudos if helpful

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Re: A grocer makes a display of cans in which the top row has one can and  [#permalink]

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New post 22 Mar 2019, 02:22
Bunuel wrote:
A grocer makes a display of cans in which the top row has one can and each lower row has two more cans than the row above it. If the display contains 100 cans, how many rows does it contain?

(A) 5
(B) 8
(C) 9
(D) 10
(E) 11


sn=n/2 * 2a+(n-1)*d
sn= 100
d=2
a=1
solve we get
n=10
IMO D
GMAT Club Bot
Re: A grocer makes a display of cans in which the top row has one can and   [#permalink] 22 Mar 2019, 02:22
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A grocer makes a display of cans in which the top row has one can and

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