 
 <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. <ibo> Ugboro anọ nke ọnụ ọgụgụ ajụjụ Mata zara bụ 4 x 2 = 8. Ya mere, Jenna zara ajụjụ 8 - 2 = 6. Ọnụ ọgụgụ ajụjụ ndị Mak zara bụ 6 / 2 = 3. Ngụkọta nke ajụjụ ndị Martha, Jenna, na Mark zara bụ 2 + 6 + 3 = 11. Ya mere, nke a pụtara na Angela nwere ike ịza 20 - 11 = 9 nsogbu. Ya mere azịza ya bụ 9. 