CAT Exam

Sum of four consecutive two digits odd numbers, when divided by 10 becomes a perfect square. Which of the following can possibly be one of these four numbers?
A)21 B)67 C)25 D)41 E)73

Read Solution (Total 2)

41

sum of 37,39,41,43 will be 160,when divided by 10 becomes a perfect square (16)
12 years agoHelpfull: Yes(4) No(2)

d)41

Let numbers will be = 2n-3, 2n-1, 2n+1, 2n+3

8n/10 must be perfect square when n = 5; n = 20.
When n=20; Numbers are 37, 39, 41, 43
When n=5; Numbers are 7, 9, 11 , 13.

According to the options, 41 is right answer.
12 years agoHelpfull: Yes(4) No(4)

CAT Other Question

A meeting is attended by 750 professionals. 450 of the attendees are females. Half the femaleattendees are less than thirty years old, and one-fourth of the male attendees are less than thirty yearsold. If one of the attendees of the meeting is selected at random to receive a prize, what is theprobability that the person selected is less than thirty years old?
(A)1/8
(B)1/2
(C)3/8
(D)2/5
(E)3/4 A total of $1200 is deposited in two savings accounts for one year, part at 5% and the remainder at 7%. If $72 was earned in interest, how much was deposited at 5%?