‘DEAN’ is related to ‘NDAE’ and ‘ROAD’ is related to ‘DRDO’ in the same way as ‘SOME’ is related to ___?

525 : 25 :: 315 :  ?

If 2 is added to each even digit and 1 is subtracted from each odd digit in the number 945217, then what will be the sum of number/numbers not repeated in the new number?

If in certain code EDITION is written as 3891965, then how TIDE will be written in that code? 

Direction : Study the following information carefully and answer the given questions.
 A, B, C, D, E, F, G and H are sitting around a circular area at equal distance between each other, but not necessarily in the same order. Some people face the centre while some face outward (i.e. in a direction opposite the centre.) B sits third to the right of E. E faces outward. Only one person sits between B and F. Both the immediate neighbours of F face outward. Only three persons sit between G and H. G is not an immediate neighbour of B. Both the immediate neighbours of D face the centre. D is not an immediate neighbour of G. Both the immediate neighbours of C face the centre. Both the immediate neighbours of E face a direction opposite that of G (i.e. if G faces the centre, then both the immediate neighbours of E face outward and vice versa).

Who among the following are immediate neighbours of F? 

Complete the following series.
BY, GT, LO, ?, VE

Direction: Each of the question below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the questions. Read both the statements and given answer.
How is ‘last’ coded in that code language?
I. ‘heavy rains last night’ is coded as ‘na ke ja lo’ and ‘finished last in race’ is coded as ‘so lo to pa’
II. ‘the furniture should last’ is written as ‘di wi to be’ and ‘give me last chance’ is written as ‘lo fa ra qi’.
(A) if the data in statement I alone are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question.
(B) if the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.
(C) if the data either in statement I alone or in statement II alone are sufficient to answer the question.
(D) if the data even in both statement I and II together are not sufficient to answer the question.

Which two signs should be interchanged to make the following equation correct?
20 ÷ 20 + 20 – 25 × 25=419