Question

Explain 15^n can never end with 0

Answer 1

Answer:

LET , TAKE A NUMBER WHICH END WITH THE DIGIT 0

SO, LET = 10

FACTOR OF 10 ==> 2 AND 5

SO, THE NUMBER ENDING WITH 0 AS 2 AND 5 AS THEIR PRIME FACTOR

AND FACTOR OF 15 ==> 3 AND 5

5 IS ALSO A FACTOR OF 15 AND 10

BUT 3 IS NOT A FACTOR OF 10

SO, IT'S NEVER END WITH 0