Each question has 3 sets of numbers. The centre number is formed by calculations involving the outside numbers.
You need to work out the formula and complete the third set of numbers using this formula.
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1.
(10 [22] 2) (4 [14] 3) (12 [ ? ] 3)
2.
(10 [5] 2) (33 [3] 11) (42 [ ? ] 6)
3.
(3 [13] 4) (2 [16] 10) (5 [ ? ] 6)
4.
(30 [39] 12) (2 [2] 3) (11 [ ? ] 25)
5.
(5 [29] 4) (3 [18] 3) (11 [ ? ] 4)
6.
(3 [6] 4) (6 [18] 6) (6 [ ? ] 7)
7.
(21 [46] 15) (3 [25] 12) (50 [ ? ] 14)
8.
(55 [6] 11) (49 [8] 7) (28 [ ? ] 4)
9.
(12 [15] 9) (29 [38] 15) (77 [ ? ] 8)
10.
(4 [39] 5) (7 [67] 10) (10 [ ? ] 3)