Find the sum of factor 19600

Find the even factor of 4200.

Find the even factor of 3600.

Find the total factor of 10500.

\(1\frac{1}{2}+4\frac{1}{6}+7\frac{1}{12}+10\frac{1}{20}\) up to 20th term. Here 20th term is 58. Find the sum?

Evaluate:

\(\frac{1}{1*3*5}+\frac{1}{1*4}+\frac {1}{3*5*7}+\frac{1}{1*4}+\frac{1}{5*7*9}+\frac{1}{7.10} \) 

up to 20 th term .

\(\frac {1}{1*2*3*4}+ \frac{1}{2*3*4*5}+----+\frac{1}{15*16*17*18}\)

Find the solution.

Find the solution:

\(\frac{1}{5*10*15}+\frac{1}{10*15*20}+\frac{1}{15*20*25}+---+\frac{1}{150*155*160}\)

30th term. Find 30th  term?

Evaluate:

\(\frac{1}{1*4*7}+\frac{1}{4*7*10}+\frac{1}{7*10*13}+\frac{1}{10*13*16}+\frac{1}{13*16*19}\)

Evaluate:

\(\frac{1}{1*2}+\frac{1}{1*4}+\frac{1}{2*3}+\frac{1}{3*4}+\frac{1}{7*10}+---+\)

 20th term?

Evaluate :

\(\frac{1}{7^2-3^2}+\frac{1}{13^2-3^2}+\frac{1}{19^2-3^2}+---+\frac{1}{49^2-3^2}\)