Table:
mahat "large, great"
masculine
feminine
neuter

singular
dual
plural
singular
dual
plural
singular
dual
plural

nominative
mahan
mahantau
mahantas
mahati
mahatyau
mahatyas
mahat
mahati
mahanti

accusative
mahantam
mahantau
mahatas
mahatim
mahatyau
mahatis
mahat
mahati
mahanti

instrumental
mahata
mahadbhyam
mahadbhis
mahatya
mahatibhyam
mahatibhis
mahata
mahadbhyam
mahadbhis

dative
mahate
mahadbhyam
mahadbhyas
mahatyai
mahatibhyam
mahatibhyas
mahate
mahadbhyam
mahadbhyas

ablative
mahatas
mahadbhyam
mahadbhyas
mahatyas
mahatibhyam
mahatibhyas
mahatas
mahadbhyam
mahadbhyas

genitive
mahatas
mahatos
mahatam
mahatyas
mahatyos
mahatinam
mahatas
mahatos
mahatam

locative
mahati
mahatos
mahatsu
mahatyam
mahatyos
mahatisu
mahati
mahatos
mahatsu

vocative
mahan, mahan
mahantau
mahantas
mahati
mahatyau
mahatyas
mahat
mahati
mahanti

Statement: the masculine exhibits the singular form mahan.
Question: what is the singular form of the masculine?
Answer: mahan