What should the number be in the lower right corner?

The answer is 6

Step-by-step explanation:

If you can see the top first digit is the product of top second digit and bottom number,

i.e.,

63.) 6 = 3 × 2

42.) 4 = 2 × 2

82.) 8 = 2 × 4

So,

61.) 6 = 1 × 6

Thus, The answer is 6

-TheUnknownScientist 72

definition: a circle is the  set of all points in a plane that are equidistant  from a given  point  called the center of the circle. we use the symbol ⊙ to represent a circle. the a line segment from the center of the circle to  any point  on the circle is a radius of the circle.

step-by-step explanation:

i googled it and this is what i got i don't know how it is. sorry.