3 x 🔲= 21

(a)  

21 $$\div$$ 🔲 = 7

(a)  

🔲x 4 = 24

(a)  

24 $$\div$$ 🔲 = 4

(a)  

16 = 🔲 x 2

(a)  

🔲= 45 $$\div$$ 5

(a)  

24 = 4 x 🔲

(a)  

5 = 50 ÷🔲

(a)  

27 ÷🔲= 3

(a)  

🔲÷ 6 = 3

(a)