Question

unit digit of product of first ten prime number is options -a)6 b)4 c)2 d)0

Answer 1

prime nos..  2,3,5,7,11,13,17,19,23,29
produt of nos. is 6469693230

last digit is known as unit digit
so , 0 is unit digit

option D is correct

Answer 2

Answer: Option 'd' is correct.

Step-by-step explanation:

Since we know that

Prime number are those numbers which are divisible by 1 and itself only.

First ten prime number are :

2, 3, 5, 7, 11, 13, 17, 19, 23.

Since there are one '2' and one '5'.

So, unit digit of product of first ten prime will definitely contains '0'.

So, the unit digit  of first ten prime will be '0'.

Hence, Option 'd' is correct.