in grps of 8..

This topic has expert replies
Senior | Next Rank: 100 Posts
Posts: 74
Joined: Mon May 26, 2008 11:23 pm
Location: Dubai
Thanked: 6 times

in grps of 8..

by shipra » Sat Jun 21, 2008 12:28 am
If 4 students were added to a dance class, would the teacher be able to divide her students evenly into a dance team (or teams) of 8?

(1) If 12 students were added, the teacher could put everyone in teams of 8 without any leftovers.

(2) The number of students in the class is currently not divisible by 8.


A) Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.

B) Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.

C) Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.

D) Either statement BY ITSELF is sufficient to answer the question.

E) Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question, meaning that further information would be needed to answer the question.
Source: — Data Sufficiency |

Senior | Next Rank: 100 Posts
Posts: 83
Joined: Wed Jun 04, 2008 3:30 am
Thanked: 4 times

by albertrahul » Sat Jun 21, 2008 5:08 am
IMO A

Let class strength be X
Statement 1 says X + 12 is divisible by 8
Eg. Let x be 12

Then 12+12 = 24

X = 28

Then 28 + 12 = 40

Hence X+4 will also be divisible by 8.

(12+4)/8 = 2

(28+4)/8 = 4

Hope this helps


Second statement does not give any useful information.