Arithmetic sequences | math4u.vsb.cz

9000064805

Level:

C

The sides of a box form three consecutive terms of an arithmetic sequence. The volume of the box is

665 {cm}^{3}

. The shortest side is

5 cm

. Find the surface area of the box.

501 {cm}^{2}

315 {cm}^{2}

615 {cm}^{2}

805 {cm}^{2}

1 215 {cm}^{2}

9000064807

Level:

C

Find the sum of the integers which satisfy the following inequality.

x^{2} - 8 x - 153 \leq 0

108

162

91

78

56

9000064808

Level:

C

The sum of the first eight terms of an arithmetic sequence is

44

. The sum of the next four terms is bigger than this value by

50

. Find the thirteenth term

a_{13}

.

31

22

25

28

34

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