What number comes in between $81$ and $83$?

Write the number for the beads shown in the abacus.

Write the number for the beads shown in the abacus. 

Write the number as shown on the abacus.

Write the number as shown on the abacus:

I have three digits $5, 2$ and $8$.

Using these, form as many two-digit numbers as you can.

Which is the largest number?

I have three digits $5, 2$ and $8$.

Using these, form as many two-digit numbers as you can.

Which is the smallest number?