`12 1/3+10 5/6-7 2/3-1 4/7=?` (a) `11(13)/(14)` (b) `13(11)/(14)` (c) `13(13)/(14)` (d) `14(11)/(13)` (e) None of these

((1)/(1.4 )+ (1)/(4.7 ) +(1)/(7.10 )+(1)/(10.13 )+(1)/(13.16)) is equal to

Simplify: (13)/(11) xx (-14)/(5) + (13)/(11) xx (-7)/( 5)

|(11,12,13),(12, 13, 14),(13, 14, 15)|=

(7)/(8)times((17)/(13)+(14)/(13))=((7)/(8)times(14)/(13))+((7)/(8)times .....)

{:(9,11,13),(13,15,17),(10,12,14),(14,16,18),(11,13,?):}

(-16)+14-(-13) is equal to: (a) -11 (b) 12 (c) 11 (d) -15

Evaluate : (13/14)^(5)-:(--------)^(2)=(13/14)^(3)

What is the ratio of the speeds of vehicle D and vehicle E on Day 2?( a) 15:13 (b) 17:13 (c) 13:11 (d) 17:14 (e) None of these