 
 <translate> Four times the number of problems Martha answered is 4 x 2 = 8. So, Jenna answered 8 - 2 = 6 problems. The number of problems Mark answered is 6 / 2 = 3. The total number of problems Martha, Jenna, and Mark answered is 2 + 6 + 3 = 11. So, this means Angela was able to answer 20 - 11 = 9 problems. So the answer is 9. <hau> Sau huɗu na yawan matsalolin da Martha ta amsa shi ne 4 x 2 = 8. Saboda haka, Jenna ta amsa 8 - 2 = 6 matsaloli. Adadin matsalolin da Mark ya amsa shine 6 / 2 = 3. Adadin tambayoyin da Martha, Jenna, da kuma Mark suka amsa ya kai 2 + 6 + 3 = 11. Wannan yana nufin cewa Angela ta iya amsa 20 - 11 = 9 Amsar ita ce 9. 