Answer: A minimum of 7 tickets need to be purchased.

Explanation:
Below are the 7 members of Mr. Mark’s family:

1) Mr. Mark’s Father is a Grandfather, Father and Father-in-law
2) Mr. Mark’s Mother is a Grandmother, Mother and Mother-in-law
3) Mr. Mark is a Father and a Son
4) Mr. Mark’s wife is a Mother and Daughter-in-law
5) Mr. Mark’s son is a Son, Brother and Grandchild
6) Mr. Mark’s daughter is a Daughter, Sister and Grandchild
7) Mr. Mark’s second daughter is a Daughter, Sister and Grandchild

The answer is

B E H K N Q T W

17th day

TFVRMNHS

9

Answer: 11
Explanation:
Sum of row 2 and row 3 comes on row 4 and square of row 2 comes on row 1.

1349