Question is total number of blocks needed for indexing...
means find blocks needed for file storing and for index...
Blocks required for record=218
entry size for index is ...2+2=4byte means a single block cn hold 4kb/4=1k entries.=210..
for sparse entry we will hold the entry of only block...
therefor block needed at first level....218-10=28 blocks at first level
now one more block at last level....
therefor total blocks would be...218+28+1 ->aprox to 220 (as other option to farther)