A cake is divided into 18 pieces. If Rehana takes 1/3 of the cake and Rahim takes 1/3 of the cake left, how many pieces are left?

A 8

B 6

C 4

D 10

Correct Answer: Option A

rehana took= 1/3 of 18 piece=6 piece

ramaining=12 pc
rahim took 1/3 of 12 pc=4 pc
total remaining=12-4=8 pc