Yes.
50
50
50
If it is less than .50, round down. If it is more than .50, round up. .37 is less than .50, so 67 dollars is the answer.
50
Ten whole numbers round to 50, if you include 50 itself which requires no rounding.
Numbers 0 to 4 round down; 5 to 9 round up. 54 rounds to 50. 55 rounds to 60. So 50 rounds to 100.
50 pence
50
Probably a 50 Yen coin from Japan
30 does not round to a nearest hundreds place. This is because it is under 50, so it would round to 0. If it was 50 or greater it would round up to 100.
50