`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

13/12+14/14=

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

R is a relation from {11, 12, 13} to {8, 10, 12} defined by y=x-3 . Then, R^(-1) is (a) {(8, 11), (10, 13)} (b) {(11, 8), (13, 10)} (c) {(10, 13), (8, 11), (8, 10)} (d) none of these

If sqrt(1+(x)/(169))=(14)/(13), then x is equal to (a) 1 (b) 13(c)27 (d) None of these

12 14 17 13 8 14 21 13 4 ?

(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,?):}