How many right angled triangles can be made from the

80        81.5        83.5         ?         89           92.5

1029, 1030, 1039, 1064, ?, 1194

What will come in place of the question mark (?) in the following number series?

124, 131, 117, ?, 110, 145

What will come in place of the question mark (?) in the following series?

34, 61, 7, ?, -20, 115

What will come in place of the question mark (?) in the following number series?

17, 28, 48, ?, 123, 182

60, 120, ?, 160, 32, 192

64, 65, 73, 100, ?, 289

44, 42, 46, 38, 54, ?

8         27          64         125       ?         343