self Maths Puzzle

5,9,16,24,?

Read Solution (Total 4)

self Other Question

125,80,45,20,?
ANS:
A.5
B.8
C.10
D.12
E.15
point O is the circumcenter of the triangle ABC with circumradius 13cm. Let BC=24cm and OD is perpendicular to bc. then the length of OD is