In a certain code language, 'come home soon' is coded as '444', 'are you coming' is coded as '336' and 'raining badly outside' is coded as '757'. How will 'kids are happy' be coded in that language?

435

Given; In a certain code language, 'come home soon' is coded as '444', 'are you coming' is coded as '336' and 'raining badly outside' is coded as '757'.

The logic;

(codes are given as per the letters in a word)

So,

1)  'come home soon' is coded as '444'

come -> 4

home -> 4

soon -> 4

2)  'are you coming' is coded as '336' 

are -> 3

you -> 3

coming -> 6

Similarly,

 'kids are happy' ....?

kids -. 4

are -> 3

happy -> 5

Thus, 435 is correct.