Explanation for Question 24 From the Math (Calc) Section on the 2020 October Sat
So question number 24 is asking us, which of the following represents a positive 2 number are increased by 5%. 3 And so here we want to think about what does the number multiplied by 4 the R really mean? And we can think if we're multiplying something by 5 0.05, that's like taking 5% of our 6 that's decreasing it, right? So whenever you have a number in front of our, 7 whatever this number is, you're only increasing. 8 If that number is greater than one, 9 if that number is less than one, then you're actually taking a smaller percentage 10 of our. So here we've actually decreased our by 5% because 11 we went from 100% are two 95% are now, 12 see, we are actually increasing 5% because we have the one. 13 And then we're adding that extra 0.05. 14 We're adding that extra 5% to it. D we're increasing by 500%. 15 We're multiplying our by five rather than by 5%. 16 And so the best answer for 24 is going to be C. 17 Um, another thing that you could do is pick a number for our, 18 for example, 10, and then plug each, 19 plug our 10 into each of these answer choices and see which one actually 20 gives you an increase of 5% of 10, 21 which would be 12. And if you were to plug it in with your 22 calculator, which you have use of, you would see that C gives you 12, 23 which is the correct increase of 5%.