Brain Training "Missing Number"

[Optic101]

[FHFinster]

90

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[bigharpoon]

24

[Trevor2118]

90

[zappaFREAK]

90

[Fuzz]

42, because the answer to everything is 42.

[Guest rob]

Another for 90

[Dozerhead]

I say 90, but I got the last math question wrong so I'm not all that confident in my answer.

[GTS21]

75

[DropTopDee]

Has to be 90....

[brschoppe]

90

[SMQQKIN]

90

[partriar]

yep answer is defiantly 90....

[Surucipe]

90

[jsd]

15

[jayceskinner]

15

[Stoyan]

90

[...]

90, final answer ?

[JoeyGunz]

15

[helix]

90

[oliverdst]

75+30/2

[PigFish]

All I want to know, is this the 64 dollar question? I have always wanted to know which question is the 64 dollar question...

I would have to line up with those that say 90.

[cpmurrin]

90

[Phillys]

90

[RijkdeGooier]

10 x 9 = 90