Declension table of dvādaśa

Masculine	Singular	Dual	Plural
Nominative	dvādaśaḥ	dvādaśau	dvādaśāḥ
Vocative	dvādaśa	dvādaśau	dvādaśāḥ
Accusative	dvādaśam	dvādaśau	dvādaśān
Instrumental	dvādaśena	dvādaśābhyām	dvādaśaiḥ dvādaśebhiḥ
Dative	dvādaśāya	dvādaśābhyām	dvādaśebhyaḥ
Ablative	dvādaśāt	dvādaśābhyām	dvādaśebhyaḥ
Genitive	dvādaśasya	dvādaśayoḥ	dvādaśānām
Locative	dvādaśe	dvādaśayoḥ	dvādaśeṣu

Compound dvādaśa -

Adverb -dvādaśam -dvādaśāt