Question

what is the common difference of an ap which a 12 minus 8 is equal to 24

Answer 1

a12-a8=24
a+11d-a+7d=24
18d=24
d=4/3

Answer 2

Answer:  6

explanation -->

given 12th term of AP - 8th term of AP = 24      -- (1)

nth term of AP = a +(n-1)d   [where a = first term, d = common difference]

----

12th term = a + 11d

8th term = a + 7d

from (1), substituting

(a+11d) - (a+7d) = 24

4d = 24

d = 6