Question

$\frac{1}{5\times6}+\frac{1}{6\times7}+........ + \frac{1}{15\times16}=?$

• A. 11/80
• B. 11/65
• C. 11/70
• D. 11/90

Answer 1

Answer:

A. 11/80

$\frac{1}{5\times6}+\frac{1}{6\times7}+........ + \frac{1}{15\times16}$

$=\frac{1}{5} - \frac{1}{16}$

$= \frac{11}{80}$