Find the missing numbers.

7?64/26 = 271 R 18
6835/5? = 128 R 51
80?4/39 = 206
?9/2836 = 35 R 71
?729/93 = 40 R 9
3?76/42 = 80 R 16
8239/8? = 94 R 61
?3908/18 = 4106

Question

Find the missing numbers.

7?64/26 = 271 R 18
6835/5? = 128 R 51
80?4/39 = 206
?9/2836 = 35 R 71
?729/93 = 40 R 9
3?76/42 = 80 R 16
8239/8? = 94 R 61
?3908/18 = 4106

phi · Answer

are you allowed to use a calculator?

anonymous · Answer

First one is 0, then 3, 3, 4th one is surely wrong, then 3, 3, 7, 7

anonymous · Answer

Yes i am allowed.

anonymous · Answer

The fourth one is 2836/?9 = 35 R 71

phi · Answer

In that case, undo the division:
7?64/26 = 271 R 18
means 26 x 271 + 18 = 7?64
using your calculator or typing 
26 x 271 + 18 = 
in the search window gives you 7064.
compare 7?64 to 7064.   the ? must be a zero.

phi · Answer

the fourth problem is more complicated
2836/?9 = 35 R 71
this means 2836= (10x+9)*35+71    (I replaced ? with x)
solve for x