Free Printable ลำดับเรขาคณิต-หา R

1.

2 , 4, 8, 16 , .... r = ?

a)

2

b)

4

c)

-2

d)

-4

2.

18, 6, 2, 2/3, .... r = ?

a)

1 $\frac{1}{2}$

b)

$\frac{1}{2}$

c)

$\frac{1}{3}$

d)

4

3.

75, 15, 5, 5/3, ....... r = ?

a)

1

b)

$\frac{1}{2}$

c)

$\frac{1}{3}$

d)

$\frac{1}{4}$

4.

- 8, - 0.8, - 0.08, - 0.008, .... r = ?

a)

1

b)

0.1

c)

- 0.1

d)

100

5.

- 1, 1, -1, 1, ....... r = ?

a)

0

b)

-1

c)

-2

d)

2

6.

$\frac{2}{3},\frac{4}{3},\frac{8}{3},......\ \ \ \ r\ =\ ?$

a)

2

b)

2

c)

3

d)

4

7.

$\frac{1}{5},\frac{1}{25},\frac{1}{125},\ .....\ \ \ r\ =\ ?$

a)

$\frac{1}{2}$

b)

$\frac{1}{3}$

c)

$\frac{1}{4}$

d)

$\frac{1}{5}$

8.

0.3, 0.09, 0.027, ...... r = ?

a)

0.1

b)

0.2

c)

0.3

d)

0.7

9.

$2\sqrt[]{3},\ 6\ ,\ 6\sqrt[]{3},\ 18,\ ...\ \ \ r\ =\ ?$

a)

$\sqrt[]{3}$

b)

2

c)

3

d)

$-\sqrt[]{3}$

10.

$2\sqrt[]{3},\ -6\ ,\ 6\sqrt[]{3},\ -18,\ ...\ \ \ r\ =\ ?$

a)

$\sqrt[]{3}$

b)

2

c)

3

d)

$-\sqrt[]{3}$

11.

216, -72, 24, ..... r = ?

a)

$\frac{1}{3}$

b)

$3$

c)

-3

d)

$-\frac{1}{3}$

12.

$\sqrt[]{2},\sqrt[]{10},5\sqrt[]{2},.....\ \ \ \ \ r\ =\ ?$

a)

$\sqrt[]{2}$

b)

$\sqrt[]{3}$

c)

$\sqrt[]{5}$

d)

$\sqrt[]{7}$

13.

$2\pi,\ 4\pi,\ 8\pi,\ .....\ \ \ \ \ r\ =\ ?$

a)

2

b)

$\pi$

c)

-2

d)

$-\pi$

14.

$3b^2,\ 6b^3,\ 12b^4,\ .....\ \ \ \ \ \ r\ =\ ?$

a)

b

b)

-b

c)

3b

d)

2b

15.

a + 3, 2a + 6, 4a + 12, 8a + 24 , ...... r = ?

a)

1

b)

-1

c)

-2

d)

2

ลำดับเรขาคณิต-หา R

Total questions: 15

Worksheet time: 8mins

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