Question

If the unit digit in the product 75 ? x 49 x 867 x 943 be 1, then the
value of ? is :​

Answer 1

Answer:

9

Step-by-step explanation:

first you have to multiply the unit digit of the three no. one by one like this 9×7=63 unit digit=3,3×3=9 we have to find by which number 9 is multiplied to get 1 and the answer is 9