81 .
A, B, C, D, E, F and G are sitting on a wall and all of them are facing east.
C is on the immediate right of D.
B is at an extreme end and has E as his neighbour.
G is between E and F.
D is sitting third from the south end.

Person who should exchange with C such that he gets the third place from north ?
A.E
B. F
C. G
D.D
E.A
82 .
($\frac{1}{3}-\frac{1}{4}$ ) is added to a number. from the sum so obtained,
1/3 of 1/4 is subtracted and the remainder is ($\frac{1}{3}+\frac{1}{4}$ ).
The number is:
A.1/12
B. 3/12
C. 5/12
D.7/12
E.11/12
83 .
Some pens are stand
Some stands are containers
All containers are boxes
All boxes are drawers

I. Some boxes are stands
II. Some drawers are stands
III. Some drawers are containers
IV. Some boxes are pens
A.Only I,II and III follow
B. Only I,II and IV follow
C. Only II,III and IV follow
D.Only I,III and IV follow
E.None follows
84 .
A number when divided by 627 leaves a remainder 43.
By dividing the same number by 19, the remainder will be ?
A.3
B. 5
C. 7
D.9
E.11
85 .
N, at a speed of 20 km/h reaches his office 10 min late.
Next time he increases his speed by 5 km/h, but he is still late by 4 min.
What is the distance of office from his house ?
A.6 km
B. 12 km
C. 18 km
D.24 km
E.None of these