Question

The temperatures, in °C , at midnight on 10 consecutive days were
4, 1, 0, –2, –1, –3, 1, –2, 3, –1
How many of these temperatures are within 2.5 °C of 1 °C ?

Answer 1

2.5 °C of 1 °C do you want 2.5 °C and 1 °C including in the answer?
If no then answer would be:
0 °C

Answer 2

the answer is 6

Answer 3

There are 6 ringed crosses showing the temperatures that are within plus and minus 2.5 degrees from one degree.