i’m not quite sure what numbers 5 and 6 are but i can say with full confidence what numbers 1-4 are:
1) 121 (B)
2) obtuse (D)
3) 5 (B)
4) (5,-7) (B)
just out of assumption for numbers 5 and 6, i would choose 16 (C) for question 5 and -11 (A) for question 6.