Number of missiles may not matter...and interception may not be necessary...if all the missiles are flying blind, deaf, and dumb.
Everyone should recall that Iran took down and captured a largely intact RQ-170 in 2011. This was a decade ago. SATCOM links can be jammed, and a drone's GPS system can be spoofed with false coordinates and tricked into thinking they're somewhere else other than where they actually are. I'm willing to bet that the RQ-170 had anti-jam GPS equipment superior to the average cruise missile. It's also important to note that military GPS receivers use the encrypted P(Y)-code GPS signal instead of the civilian one. So does that mean Iran broke through the encryption? What about the internal INS system? How did Iran manage to spoof that? I have no idea, but Iran brought down the stealth drone.
Another thing...note the range of a Russian handheld GPS jammer from 1997.
In 1997 a Russian company offered a handheld four-watt GPS and GLONASS jammer that was effective at ranges of up to 150 to 200 kilometers.
A new investigative report by the Russian independent media group “The Project” into luxury dachas owned by high-ranking government officials revealed that
www.gpsworld.com
The aircraft below is a Chinese electronic warfare "theater suppression" aircraft. I think it's a little bigger than a handheld jammer.
Think of this aircraft as the Chinese equivalent to the EC-130H Compass Call. Here's the description from af.mil:
The Block 35 Baseline 1 EC-130H provides the Air Force with additional capabilities to jam communication, Early Warning/Acquisition radar and navigation systems through higher effective radiated power, extended frequency range and insertion of digital signal processing
The EC-130H Compass Call is an airborne tactical weapon system using a heavily modified version of the C-130 Hercules airframe.
www.af.mil