Rough Root

Which of these options is closest to this square root?
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative


Which of these is closest to $\sqrt{\dfrac{10 000}{2012}}$?

a) 1.9

b) 2.2

c) 2.5

d) 2.7


This problem is taken from the World Mathematics Championships