That "lowest score possible" for the Army is a 31 percentile on the AFQT, which is a proxy for an IQ score. That means about 100 million Americans are too stupid to carry a rifle. My understanding is that the real score is actually higher than the advertised minimum.
I've taken the ASVAB and it is definitely not a meter of IQ. Middle school children who at least know simple algebra would have no problems scoring fairly well.
The ASVAB iirc was designed to determine critical thinking and mechanical skills. If you aced it, you either studied or shouldn't be in the army.
