Which letter-cluster will replace the question mark (?) to complete the given series?

DMT, JOB, PQJ, VSR, ?

Which of the following numbers will replace the question mark (?) in the given series?

345, 356, 368, 381, 395, ?

By interchanging the given two signs and numbers which of the following equation will be correct?
 × and +, 9 and 6

In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusion logically follows the given statements.

Statements:
 Some grasses are trees.
 Some trees are branches.
 Some branches are dogs.

Conclusions:
 I. Some grasses are branches.
 II. Some trees are dogs.
 III. Some grasses are dogs.
 IV. Some branches are grasses.

Select the odd group of numbers. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g.13 – Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

Option 

Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E. g. 13 – Operations on 13 such as adding / subtracting / multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

(15, 9, 4)
 (7, 2, 3)

Select the option that is related to the fifth letter cluster in the same way as the second letter cluster is related to the first letter cluster and the fourth letter cluster is related to the third letter cluster.
 CONTROL : NOCTRLO :: MISTAKE : SIMTAEK :: JOURNAL : ?

Which letter-cluster will replace the question mark (?) to complete the given series?

LAT, NDR, PGP, ?, TML