In one study, 51 volunteers from middle school students were divided into a test group and a control group and trained in the same math skills  During the five-day training, the researchers used a technique called transcranial random noise stimulation to deliver mild shocks to areas of the brain thought to be related to computing power in 25 members of the test group  The results of subsequent tests showed that the ability to perform mathematical operations of the members of the test group was significantly higher than that of the control group  To their surprise, the improvement of this ability can last at least half a year
As a result, the researchers believe that to deliver mild shocks in the brain can improve the brain's ability to calculate
Before the experiment, the math scores of the two groups were about the same.