You have two clock signals of different pulses, one of 25 pulses per second, the other of 30 pulses per second. You do not have an oscilloscope.
Design a circuit that will take two clocks with different pulses as an input, determine within one second the faster clock and lights an led to denote the faster clock. The led should stay on until it is reset by a control signal. (For this circuit you can use AND, NOT, OR, SR latches, T-FF's, leds, resistors, D-FF's, switches).