hi infinity0,
for this problem u have to calculate but u can make it easy by taking figures which will make your calculation fast n easy
Is there a way to do this problem using logic and avoiding calculations, especially when running out of time? It'd be much appreciated. Thanks.
The 1992 census found that city A had 18% fewer residents than city B. The 1994 census found that city A's population grew by 18% over 1992, while city B's population had remained the same.
Col A: population of city A in 1994
Col B: population of city B in 1994
Ans: B
I will win
If 72.42 = k(24+n/100) where k and n are positive integers and n <100 then k+n
17
16
15
14
13
another problem:
Y X 7 + 6 Y = Y 7 X
In the sum above ,if X and Y each denote one of the digits from 0 to 9 inclusive then X =
9
5
2
3
1
0
Last edited by comp; 01032006 at 08:06 AM. Reason: Automerged post
sorry you r rightOriginally Posted by comp
first clue is that there is no carry from tens to hundreds
if we look only tens
X
6

7
i thought at first X can be 1 if it is 1 then
if we look at unit digits
7
Y

1 <<< X
so Y is either 6 or 4 but if it is 4 then there is a carry so the whole calculation is wrong then
I thought let X be zero I didnt tried numbers greater than 1 since if I had used it the same scenario occurs as it occured with X=1
so X=0
by looking tens
X
6

7
since X=0 there should be a carry from unit digits
7
Y

0 <<<< X
so Y can be 7 or 3 so naturally it is 3 then the sum becomes 10 one carry occurs it adds to tens then th whole calculation is correct
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