Question

Write all the square numbers you can round up to 200

Answer 1

To round UP to two hundred, meaning the nearest hundred??? means we want square numbers, 150≤n<200.

The only squares in that range (integer squares that is) are 13^2 and 14^2

169 and 196

Answer 2

13 and 14 squared all round up to 200.

13^2=169 rounded to the nearest hundred is 200
14^2=196 rounded to the nearest hundred is 200

We can't go any lower than 13 because 12^2=144, and 144 rounds to 100. We also can't go any higher than 15 because 15^2=225, and 225 rounds down to 200, not up (Thanks Irspow).
:)