Question

What is the units' digit of the product of all prime numbers between $1$ and $100$?

• A. $0$
• B. $1$
• C. $2$
• D. $3$

Answer 1

The correct option is A $0$

Prime numbers between $1$ and $100$ include
$2$ and $5$ whose product is $10$ i.e. a zero in
the units' place $\therefore$ Product of primes
between $1$ and $100$ has zero in units' place