according to some certain rule, which number should be put in it, why?
12（56）16
17（ ）21
2007-09-05 06:16:41 · 6 answers · asked by Gabriel 1 in Science & Mathematics ➔ Mathematics
These questions are always ambiguous. 56 is 4 x 14, with 14 halfway between 12 and 16. so 4 x 19 = 76 would follow that pattern with the 2nd set of numbers. But you can invent endless other patterns. The trick is seeing the same one the question writer came up with.
2007-09-05 06:31:34 · answer #1 · answered by Philo 7 · 0⤊ 0⤋
I think that 2(sum of no.)=76. So, 76 should come in the equation - 17 ( ) 21 = 17 (76) 21
It is because in the solved eqation this formula is used.
2(12+16) = 56
2007-09-05 06:43:55 · answer #2 · answered by Dhruv J 1 · 0⤊ 0⤋
61 goes in there. 56 is 44 more than 12 and 40 more than 16.
Using the same logic, 61 is 44 more than 17 and 40 more than 21.
2007-09-05 06:25:14 · answer #3 · answered by wacjr79 3 · 2⤊ 0⤋
61 --The numbers only the ends are 5 plus the number in the first sequence. Add 5 to the middle number and you get 61. It's deductive reasoning that brings you to that conclusion.
2007-09-05 06:26:48 · answer #4 · answered by Allison P 4 · 1⤊ 0⤋
76
Because the number in the bracket is twice the sum of numbers outside.
2007-09-05 06:27:42 · answer #5 · answered by Madhukar 7 · 2⤊ 0⤋
61
Increase by 5
2007-09-05 06:30:16 · answer #6 · answered by David 4 · 0⤊ 0⤋