CAT
Exam
A group of 630 children is arranged in a rows. Each row contains three fewer children than the row in front of it.What number of rows is not possible ?
A)3 B)4 C)5 D)6 E)7
Read Solution (Total 2)
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- 6 rows are not possible
630 = (n/2) *(2a+(n-1)*3)
For n=6, a is coming -ve. - 11 years agoHelpfull: Yes(10) No(4)
- ans 3
207, 210, 213 - 11 years agoHelpfull: Yes(1) No(1)
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