Two pipes A and B are attached to a cistern. Pipe A can fill the cistern in 3 hours while pipe B can empty it in 9 hours. When both the pipes are opened together, find the time for filling the cistern?

How many such pairs of letter are there in the word PACKETS, each of which has as many letters between them in

the word (in both forward and backward directions) as they have between them in the English alphabetical series?

'HC' is related to 'KQ' in a certain way. Similarly, 'OG' is related to 'AB' in the same way. To which of the following

is 'RK' related following the same pattern?

If in a certain code, 'BIND' is coded as 'CLGB' and 'HELD' is coded as 'FDJB' based on the series given above How

will 'FORK' be coded in the same code language?

Which of the following percentages is most likely to be B's percentage in the

exam?

(Qn 3-4)Read the following information carefully and answer the questions which follow.

Among A,B,C,D and E, each scored different marks in an examination. only one

person scored more than C. E scored more than A but less than D. D did not score

the highest marks. The one who scored the second lowest scored 71% marks. C

scored 92% marks.

3.Who among the following is most likely to have scored 87% marks?