<Tr> <Th> Composition method </Th> <Td> Collegium System </Td> </Tr> <Tr> <Th> Authorized by </Th> <Td> Constitution of India </Td> </Tr> <Tr> <Th> Judge term length </Th> <Td> Mandatory retirement at 65 years of age </Td> </Tr> <Tr> <Th> No. of positions </Th> <Td> 31 (30 + 1) (Sanctioned strength) 25 (24 + 1) (Present strength) </Td> </Tr>

Describe any three judicial powers of supreme court in india