Which of the following fractions can be written as the difference of reciprocals of two consecutive integers
Choose the correct choice from the following answers
A) 1/24
B) 7/30
C) 12/45
D) 1/56
E) 1/72
Difference of reciprocals means 1 has to be in the numerator;   So option BD can be ignored   For option A, BE, we require to search two consecutive numbers whose product is the denominator   24 = 4 * 6 ......... Ignore   56= 7 * 8 ........ Answer   72 = 8 * 9 ................ Ignore   Answer = 1/56
<result>D</result>
Which of the following fractions can be written as the difference of reciprocals of two consecutive integers