If 5*3=4 2*8=2 and 6*3=3 find the value of 1*7=?

Question

A 3rd grade math test included this rather tough challenge. Can you solve it?

Answer 1

9.

nine is the answer because 5*3=4

                                        2*8=2

                                        5*1=6

                                        6*3=3

                                        1*7=?

in the first one it equals 4

4 + 2 (from the second sum) equals 6 in the third sum.

so 6 + 3 (from the fourth) must equal 9 in the last sum.

Answer 2

Answer is 4. Sum of all 3 numbers is 12.

Answer 3

The answer is 4