Loading....
Coupon Accepted Successfully!

Previous Year Paper

Open Flashcards

CAT-2005-Previous Years Paper

Question
25 out of 30
 

Let S be a set of positive integers such that every element n of S satisfies the conditions:

I. 1000 ≤ n < 1200

II. Every digit in n is odd

Then how many elements of S are divisible by 3?



A 9
B 10
C 11
D 12

Ans. A

The 100th and 1000th position value will be only 1.

Now the possibility of unit and tens digits are (1, 3), (1, 9), (3, 1), (5, 5), (7, 3), (7, 9), (9, 1), (9, 7).

CAT-2005-Previous Years Paper Flashcard List

30 flashcards
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)