`4/13 + 9/13 + 2/13` = `?/13`

solve the following: 4/13 + -5/8 + -8/13 + 9/13

Solve the following 7/13 + -9/13 = (--+(-9))/13 = (---)/13

Solve the following: 3/13 - 2/13 + 5/13

Arrange in ascending order: 3/13, 8/13, 6/13, 7/13

13 13 19 43 103 ?

Check if lines with direction-cosines : lt (12)/(13) , - (3)/(13) , - (4)/(13) gt , lt (4)/(13) , (12)/(13), (3)/(13) gt , lt (3)/(13) , (4)/(13) , (12)/(13) gt are mutually perpendicular .

Add the following: 3/13 + 7/13 + 1/13

Let P(A)=7/(13), P(B)=9/(13) and P(AnnB)=4/(13) . Then P( A //B)= 5//9 b. 4//9 c. 4//13 d. 6//13

Show that the three lines with direction cosines 12/13,-3/13,-4/13,4/13,12/13,3/13,3/13,-4/13,12/13 are mutually perpendicular.

Let A ={9, 10, 11, 12, 13) and f: A-> N be defined by f(n)-highest prime factor of n, 33. 1) (13) 3) (11, 13 13, 5, 11, 13 4) [2, 3, 5, 11)