Loading....
Coupon Accepted Successfully!

Previous Year Paper

Open Flashcards

CAT-2002-Previous Years Paper

Question
24 out of 50
 

A child was asked to add first few natural numbers (i.e., 1 + 2 + 3 +…) so long as his patience permitted. As he stopped, he gave the sum as 575. When the teacher declared the result as wrong, the child discovered he had missed one number in the sequence during addition. The number he missed was



A Less than 10
B 10

C 15
D More than 15

Ans. D

575 = x

1150 = n2+ n 2x

n(n + 1) 1150

n + n 1150

The smallest value for it is n = 34.

For n = 34

40 = 2x x = 20

CAT-2002-Previous Years Paper Flashcard List

50 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)
31)
32)
33)
34)
35)
36)
37)
38)
39)
40)
41)
42)
43)
44)
45)
46)
47)
48)
49)
50)