When I graduated a lot of grad schemes required a numeracy test.
first comment - numeracy is NOT maths. You might be a great mathematician and good at stats and data analysis but need a calculator to work out your times tables.
second comment - a lot of the questions were very wordy and were torturing the English language quite a lot to get across what they wanted you to do. I’m a native English speaker and for some of the questions there was literally a paragraph of info to pick out what you needed to do
third comment - the tests I did were timed. And the time given was not long. If English was your second language that would slow you down, in practice nobody needs to do percentages at that sort of speed in real life. It’s a bit like the times tables yesterday in schools - yes, kids need to know their tables but when you get to the point that they need to answer in under a second it’s getting a bit ridiculous.
fourth comment, most of the tests needed to be done in controlled conditions and you had to book into an exam centre a bit like the ones for the driving theory test. It was a major pain in the bum to be honest and most people would need to travel to their nearest major town which yes is going to put off poorer and less advantaged applicants.