Ce urmeaza
Ce urmeaza ? Determinati X
Test de inteligenta
Probleme de logica

           


Ce urmeaza ? Determinati X

A. 9, 12, 18, X, 43

B. 1, 3, 15, 255, X

C. 2, 6, 12, 20, 30, 42, 56, X

Raspunsuri

A. Secventa se construieste astfel:
8 + 1 = 9
9 + 1 + 2 = 12
12 + 1 + 2 + 3 = 18
18 + 1 + 2 + 3 + 4 = 28 = X
28 + 1 + 2 + 3 + 4 + 5 = 43 Verificat.

B. Secventa se construieste astfel:
1

1 + 2 = 3
1 x 3 = 3

3 + 2 = 5
3 x 5 = 15

15 + 2 = 17 15 x 17 = 225

X = ( 255 + 2) x 255 = 1295

C. Secventa se construieste astfel:
1 x 2 = 2
2 x 3 = 6
3 x 4 = 12
4 x 5 = 20
5 x 6 = 30
6 x 7 = 42
7 x 8 = 56
8 x 9 = 72

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