  The maximum of a solar cycle contain two or more peaks, known as Gnevyshev
peaks. Studies of this property of solar cycles may help for better
understanding the solar dynamo mechanism. We analysed the 13-month smoothed
monthly mean Version-2 international sunspot number (SN) during the period
1874-2017 and found that there exists a good correlation between the amplitude
(value of the main and highest peak) and the value of the second maximum (value
of the second highest peak) during the maximum of a solar cycle.Using this
relationship and the earlier predicted value 86 (~92) of the amplitude of Solar
Cycle 25, here we predict a value ~73 (~79) for the second maximum of Solar
Cycle 25. The ratio of the predicted second maximum to the amplitude is found
to be 0.85, almost the same as that of Solar Cycle 24.The cosine fits to the
values of the peaks that occurred first and second during the maxima of Solar
Cycles 12-24 suggests that in Solar Cycle 25 the second maximum would occur
before the main maximum, the same as in Solar Cycle 24. However, these fits
suggest ~106 and ~119 for the second maximum and the amplitude of Solar Cycle
25, respectively. We analysed the polar-fields data measured in Wilcox
Observatory during Solar Cycles 20-24 and obtained a value ~125 for the
amplitude of Solar Cycle 25. This is slightly larger-whereas the value ~86
(~92) predicted from the aforementioned relationship is slightly smaller-than
the observed amplitude of Solar Cycle~24. This difference is discussed briefly.
