Question

find the unit digit of 2^3^4×3^4^5×4^5^6×5^6^2×6^7^8×7^8^9 is
option is
a 0 b 5 c 2 d none of these​

Answer 1

Answer:

The answer is option a. 0

Answer 2

Step-by-step explanation:

The answer is a.0.

This is because as we know , 10 is a product of 2 numbers - 2 and 5. Therefore if there is a pair of 2 and 5 in any product , we can easily figure out that the particula product will always end in 0 , no matter what 2 and 5 are multiplied with.

In this product also we can see a pair of 2,5. Therefore this product will also end in 0.

This is the reason why option a.0 is the answer