Asked by PRIDE
All the even numbers from 2 to 98 inclusive, except those ending in
0, are multiplied together. What is the rightmost digit, that is,
the units digit of the product?
0, are multiplied together. What is the rightmost digit, that is,
the units digit of the product?
Answers
Answered by
drwls
2*4*6*8 = 384, and that last digit "4" will be the last digit of each group of _2,_4,_6,_8 that gets multiplied. After multiplying 10 numbers that end in 4, the last number will be the same as the last digit of 4^10, which is 6.
Answered by
james
What two numbers multiplied together equals 5040 and added together equals 98