Given that and are both rounded to 1 decimal place, what is the upper bound of ?
Answer and explanation
Correct answer: A.
- Step 1: To make a quotient as large as possible, take the largest numerator and the smallest denominator.
- Step 2: Upper bound of is and lower bound of is .
- Step 3: So the upper bound is .
Answer
.
Why not the others: : divides by the upper bound of , which gives the smallest quotient not the largest. : uses the lower bound of . : uses the rounded values with no allowance for error.
Practise more Number.
Free questions with an explanation for every one, and full timed ESAT (Engineering and Science Admissions Test) mock tests.