Find the missing term in the following image?

If 1+4=9, 2+8=18, 3+6=15 then the value of 7+8=?

Sonia left her house and went 4 km east then she turned left and walked 6 km. Then she turned right and walked 4 km. How far is he from the departure point?

If PKROK code with 72962 and KRRPK coded with 29972 then how will be coded NJMLZ?

Pointing towards a woman, Amit said, "She is the sister of my wife's husband." How is the woman related to Amit?

From the given alternative words, select the word which cannot be formed using the letters of the given word:
MERCHANDISE

Arrange the given words in the sequence in which they occur in the dictionary.
(1) Necrology
(2) Nacromancy
(3) Necropolis
(4) Nacrophilia

Complete the following alphabet series.
ABC, PQR, DEF, STU, ?