Question

How many zeros will be there at the end of the expression 7 * 14 * 21 * * 777?

Answer 1

Final Answer : There will be no zeroes

Steps:
1) We have,
Prime Factorisation
$7 = 7 \\ 14 = 7 \times 2 \\ 21 = 7 \times 3 \\ 777 = 3 \times 7 \times 37$

2) For to be zeroes at the end of given expression, there is must be at least Factors of 5 & 2 in the prime factorization of given numbers.

3)
There are none factors of 5 .
So, there will be none zeroes at the end of
7*14*21*777.