Question

find four rational numbers between -2 and 5

Answer 1

(-2+5)/2=1.5
(-2+1.5)2=0.25
(1.5+5)/2=3.25
(3.25+5)/2=4.125

Answer 2

we want four rational numbers then simply

-2 get multiplied by 4+1
-2 = -2*5/1*5 = -10/5
5 = 5*5/1*5 = 25/5

-10/5<-9/5<-8/5<-7/5<-6/5<25/5