Q1: A 12 MHz clock frequency is applied to a cascaded counter containing a modulus-5 counter, a modulus-8 counter, and a modulus-10 counter. The lowest output frequency possible is ________.

ANS:C - 30 kHz

Cascaded counter containing a modulus-5 counter, a modulus-8 counter, and A modulus-10 counter.
So 5*8*10=400.
mod(400)
12 MHz clock frequency
The lowest output frequency possible is
12mhz/400=30 khz