multiple Q prob

This topic has expert replies
Source: — Problem Solving |

Master | Next Rank: 500 Posts
Posts: 130
Joined: Sat Dec 29, 2007 5:35 am
Location: SGP
Thanked: 5 times

by satish.nagdev » Sat Oct 31, 2009 7:54 am
IMO its 62

260/4 = has 66 numbers with 4 as factor plus we'll leave 4, 8, 12, 16 = 4 numbers hence 62 in total
Wounded by GMAT but not dead

Legendary Member
Posts: 882
Joined: Fri Feb 20, 2009 2:57 pm
Thanked: 15 times
Followed by:1 members
GMAT Score:690

by crackgmat007 » Sat Oct 31, 2009 11:19 am
satish.nagdev wrote:IMO its 62

260/4 = has 66 numbers with 4 as factor plus we'll leave 4, 8, 12, 16 = 4 numbers hence 62 in total
260/4 = 65 numbers, this includes 260 as well. Hence 64. Applying same logic, we get 60.

Edited to avoid confusion
Last edited by crackgmat007 on Sat Oct 31, 2009 1:50 pm, edited 1 time in total.

Newbie | Next Rank: 10 Posts
Posts: 3
Joined: Sat Mar 08, 2008 8:47 pm

by byby030384 » Sat Oct 31, 2009 12:39 pm
How many multiples of 4 are there between 16 and 260?

Two Keyis not to include 16 and 260.

Divide 4 by 20 and 256 and you will have 5 and 64.

Next 64 - 5 + 1 = 60.

Legendary Member
Posts: 1161
Joined: Mon May 12, 2008 2:52 am
Location: Sydney
Thanked: 23 times
Followed by:1 members

by mehravikas » Sat Oct 31, 2009 7:04 pm
I think it should be 62

Master | Next Rank: 500 Posts
Posts: 130
Joined: Sat Dec 29, 2007 5:35 am
Location: SGP
Thanked: 5 times

by satish.nagdev » Sat Oct 31, 2009 8:28 pm
crackgmat007 wrote:
satish.nagdev wrote:IMO its 62

260/4 = has 66 numbers with 4 as factor plus we'll leave 4, 8, 12, 16 = 4 numbers hence 62 in total
260/4 = 65 numbers, this includes 260 as well. Hence 64. Applying same logic, we get 60.

Edited to avoid confusion
oh yea thanks man for correcting .... :)
Wounded by GMAT but not dead

Master | Next Rank: 500 Posts
Posts: 328
Joined: Thu Aug 07, 2008 5:25 pm
Location: Philadelphia
Thanked: 4 times
GMAT Score:550

by Abdulla » Sat Oct 31, 2009 10:49 pm
IMO it's 62

= (Last term - First term) / Increment +1
= { ( 260-16 ) / 4 } +1
= ( 244 / 4 ) +1
= 61+1
= 62 ..#
Abdulla

Master | Next Rank: 500 Posts
Posts: 182
Joined: Sun Aug 02, 2009 7:19 pm
Thanked: 18 times
GMAT Score:680

by sanjana » Sat Oct 31, 2009 11:07 pm
Abdulla wrote:IMO it's 62

= (Last term - First term) / Increment +1
= { ( 260-16 ) / 4 } +1
= ( 244 / 4 ) +1
= 61+1
= 62 ..#
It says between,so we should not include 16 and 260.
If the question said inclusive then the answer would be 62

Master | Next Rank: 500 Posts
Posts: 328
Joined: Thu Aug 07, 2008 5:25 pm
Location: Philadelphia
Thanked: 4 times
GMAT Score:550

by Abdulla » Sat Oct 31, 2009 11:09 pm
sanjana wrote:
Abdulla wrote:IMO it's 62

= (Last term - First term) / Increment +1
= { ( 260-16 ) / 4 } +1
= ( 244 / 4 ) +1
= 61+1
= 62 ..#
It says between,so we should not include 16 and 260.
If the question said inclusive then the answer would be 62
Oh yeah !! thanks sanjana :D
Abdulla