Sumithra Sen wrote:
Is there a simple strategy to solve questions that ask you to find total of a table with 7 rows and 7 columns
I cant draw a table here..
The table is like this
1 2 3 4 5 6 7
-2 -4 -6-8 -10- -12 -14.
7 14 ...................49
I am not sure but i think the series in each row looks like arithmetic progression we can use
sum = n( a1 + an) /2 for individual row and add it.
I forgot to add that
for some rows we may need to apply the following formula
sum = n [ 2*a1 + (n-1) d]/ 2
n= num of terms
d = common differnce between 2 consecutive tems