Answer: Four
Kunti had four sons: Yudhishtara, Bheema, Arjuna and Karna. The other two pandavas - Nakula and Sehdeva - were the sons of Pandu and Madri.
From Quiz: Mahabharata
Answer: Dhritarashtra
Dhritarashtra, Hastinapur's king at the time of the great war, had only one wife, Gandhari, but she bore him a hundred sons and a daughter. Moreover, when his wife was in an advanced state of pregnancy, he conceived another son (Yuyutsu) with his maid servant.
Shantanu, the youngest son of King Pratipa of Hastinapur, had two wives: Ganga (Bhishma's mother) and Satyavati (mother of Chitrangad and Vichitravirya); though, to his credit, only one at a time.
Bhishma (he of the terrible oath) had vowed life-long celibacy and he honoured that vow till his last days (as opposed to Pandu, upon whom celibacy had been enforced by Rishi Kindam's curse and who still couldn't control himself, which ultimately led to his death.) Consequently, Bhishma had no wife, because of which he even succeeded in making Amba (reborn as Shikhandi) his arch-rival.
I hope you didn't answer 'Arjuna' because he was the most 'adventurous' of all. He had more than forty main wives (lucky fellow!).
Apparently, polygamy was a done thing during those times. It was only in the nineteenth century that some Indian reformers like Raja Ram Mohun Roy tried to rid the society of this practise.
From Quiz: Mahabharata - Kingship Knows No Kinship!
Answer: Karna
Karna wanted to prove that he was the best archer in the world, but he didn't have any royal descent -- so Duryodhana crowned him King of Anga and so he therefore had some royal heritage. However, after this, Queen Kunti saw his belt clip and she realised that Karna was the son that she had abandoned.
From Quiz: The Mahabharata
Answer: Varuna
Agni made the bow and then requested the wise and old Varuna to give the Gandiva bow to Arjuna.
From Quiz: Mahabharata : The Great Indian Epic
Answer: Shalya
Shalya was the brother of Madri, the mother of Nakula and Sahadeva. He had been tricked into helping Duryodhana in the war but secretly promised the Pandavas that he would let no harm come to Arjuna when he fought against Karna as he would be Karna's charioteer. Thus, Karna was killed by Arjuna.
From Quiz: A True Friend: Karna
Answer: Arjuna
Arjuna's charioteer was Sri Krishna. Arjuna was also known by many names such as Dhananjaya and Partha.
From Quiz: The Grand Old Man: Bheeshma
Answer: Uttar
Uttar was the Prince of the kingdom of Virat, where the Pandavas had taken refuge in their 13th year of hiding. He was killed by Shalya.
From Quiz: The Great War (The Mahabharatha II)
Answer: Bheema and Hidimbaa
Bheema and Hidimbaa were Gatotkacha's parents. Bheema killed Hidimbasura, Hidimbaa's brother.
From Quiz: Mahabharata -The Greatest Epic Part 2
Answer: Dushala
Dushala was the sister of the Kauravas. She later married Jayadrata.
From Quiz: Mahabharata -The Greatest Epic, Part 1
Answer: Bhima
Lord Krishna helped Bhima in killing Jarasandha.
From Quiz: The Great Mahabharatha
