Missing Term
Recursive
Definitions
Arithmetic
Geometric
Fun Riddles
100

3, 9, 15, 21, ...

Find the next three terms!

27, 33, 39

100

Write the recursive equation for the sequence:

6, 14, 22, 30, ...

f(n) = f(n-1) + 8

100

Is this sequence arithmetic or not? 0, 3, 8, 15, 24, ...

It's arithmetic.

100

What is the growth factor of the following sequence?

27, 9, 3, 1

1/3

100

f two’s company and three’s a crowd, what are four and five?

9

200

5, 25, 125, ...

Find the next three terms!

625, 3125, 15625

200

Write the recursive equation for the sequence:

8, 16, 32, 64, 128, ...

f(n) = f(n-1) * 2

200

What is the 7th term in the sequence? 0, 3, 8, 15, 24, ...


The 7th term in the sequence is 48.

200

Find the missing terms in the geometric sequence:


x            1          2           3           4             5        

f(x)        4         __         __          __           64

8, 16, 32

200

I am a two-digit number. My tens digit is twice my ones digit. I am less than 50. What number am I?

42

300

Find the missing terms!

25,__,__,__, -3

18, 11, 4

300

The recursive equation for a sequence is

 f(n) = f(n-1) + 7. If the first term of the sequence is 17, list the first 4 terms of the sequence.

17, 24, 31, 38

300

What are the missing terms in the sequence: 30, __, ___, -3

19, 8

300

Find the missing terms of 810, ___, ___, ___, 10.

270, 90, 30

300

What 3 positive numbers give the same answer when multiplied and added together?

1, 2, and 3 (1×2×3 = 6 and 1+2+3 = 6).

400

Find the missing terms!

2,__,__,__,__, 486

6, 18, 54, 162

400

An arithmetic sequence is as follows:
2,__, 6,__, 10

Write the recursive equation.

f(n) = f(n-1) + 2

400

What are the missing terms in the sequence: 9, __, __, 45

21, 33

400

What would the next term in the geometric sequence be?

600, 300, 150, ____

75

400

If you buy a rooster to lay eggs and expect to get three eggs each day for breakfast, how many eggs will you have after a week?

0, roosters don’t lay eggs!

500

Find the missing terms!

243,__,__,__, 3

81, 27, 9

500

An geometric sequence is as follows:
3,__, 27,__, 243

Write the recursive equation.

f(n) = f(n-1) *3

500

Find the missing terms in the sequence


7, ___, ___, ___, ___, 72

20, 33, 46, 59


500

write a recursive definition for the following geometric sequence 

1, 2, 4, 8, 16

 P(1) = 1 P(n-1)* 2  

500

I am a number. Remove one letter from me and I become even. What number am I?

Seven (remove the “s”)

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