Question

4*? =2*? =16
5*? =2*? =20
4*?=8*?=40
?*?=?*?=6

Answer 1

4*? =2*? =16

4 × 4 = 2 × 8 = 16

5*? =2*? =20

5 × 4 = 2 × 10 = 20

4*?=8*?=40

4 × 10 = 8 × 5 = 40

?*?=?*?=6

2 × 3 = 6 × 1 = 6

Answer 2

4*4=2*8=16.
5*4=2*10=20.
4*10=5*8=40.
3*2=6*1=6.
Coroana???
* = inseamna inmultire.