### 442 Responses to The Mathematical Challenge

1. Zahi November 14, 2017 at 12:41 PM #

84

2. Ibrahim November 13, 2017 at 3:30 PM #

91

3. Ibrahim November 13, 2017 at 3:27 PM #

70

4. Umer November 12, 2017 at 11:35 AM #

(((6+7)*8))-(6+7)) = (13*8)-(13) =(104-13) = 91

5. Mgh November 10, 2017 at 5:00 PM #

92

6. ali November 9, 2017 at 11:51 AM #

56+)7*5( =91

• ali polat November 9, 2017 at 12:07 PM #

7*13= 91

• Adnan Cora November 9, 2017 at 5:18 PM #

7×8=56
(6-1) 7=35
35+56=91

• farid elsheikh November 9, 2017 at 7:42 PM #

correct answer 91 …. very good

7. Sidick November 8, 2017 at 9:27 PM #

87

8. Yousef November 8, 2017 at 9:10 PM #

(3*4)+(2*2-1)= 12+3=15
(4*5)+(3*3-1)= 20+8=28
(5*6)+(4*4-1)= 30+15=45
(6*7)+(5*5-1)= 42+24=66
(7*8)+(6*6-1)= 56+35=91

? = 91

9. Salah Abu Elhassan November 8, 2017 at 8:21 PM #

91

10. Muhammad K. Saleem November 8, 2017 at 6:33 PM #

91

• Nidal Elayyan November 8, 2017 at 7:27 PM #

91 correct

11. Jamal Mourad November 8, 2017 at 4:05 PM #

(7*8)+(7*5)=91

12. usama November 8, 2017 at 2:46 PM #

91

13. Shamsul Arefin November 8, 2017 at 2:43 PM #

91

14. Yasser November 8, 2017 at 2:28 PM #

89

15. Wahid November 8, 2017 at 2:26 PM #

91

16. mafbadr November 8, 2017 at 2:24 PM #

91

17. gannaf November 8, 2017 at 1:38 PM #

[(2-1)*3]+12=15
[(3-1)*4]+20=28
[(4-1)*5]+30=35

[(6-1)*7]+56=91

18. Fakhar November 8, 2017 at 1:04 PM #

91

19. Mohamed alli November 8, 2017 at 1:02 PM #

91

20. Qaq November 8, 2017 at 12:55 PM #

72

21. Sasha November 8, 2017 at 12:35 PM #

(2+3)*3=15
(3+4)*4=28
(4+5)*5=45
(5+6)*6=66
(6+7)*7=91