Help the unicorn in math quiz

Question 1

11×1∅×∅=?

A. 0
B. 111
C. 110
D. 1

Answer: A

0

Question 2

2∅+?+7-12=2∅

A. 7
B. 2
C. 5
D. 9

Answer: C

5

Question 3

17+?+12-∅= 32

A. 10
B. 5
C. 0
D. 3

Answer: D

3

Question 4

32-?-1∅+4=16

A. 8
B. 10
C. 2
D. 12

Answer: B

10