2. Which one of these is a multiple of 24 ?
A 200
B 300
C 400
D 500
E 600
2. E The correct answer is a multiple of both 3 and 8 , as $24=3 \times 8$. Although 100 is a multiple of 4 , it is not a multiple of 8 . Therefore even multiples of 100 are multiples of 8 , but odd multiples are not. This leaves 200, 400 and 600 , but of these only 600 is also a multiple of 3 . Hence the only option which is a multiple of 24 is 600 .