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Mixed Sequences
Arithmetic
Modeling
Find the Missing term(s)
Geometric
100

Write the formula for the sequence: 12, 14, 16, 18, 20, .....

an=12 +2(n-1)

100
This is the value of the 60th term when the 1st term is 5 and the common difference is -5.
What is -290?
100

A bank account has $50. You add $10 to your account every week. Write the formula to model the amount of money in your account.

an=50+10(n-1)

100
Find the missing term in the following Arithmetic sequence. 3, ___ ,17
What is 10?
100
This is the value of the 10th term when the 1st term is 1 and the common ratio is 3.
What is 19683?
200

Write the formula for the sequence: 3, 8, 13, 18, 22, .....

an=3 + 5(n-1)

200

The value of the 1st term when the 23rd term is 36 and the common difference is 2.

What is -8?

200

There are 4 rabbits in the zoo. The number of rabbits doubles each year. Write the formula to model the number of rabbits in the zoo.

an=4(2)n-1

200
Find the missing term in the following Geometric sequence. 2, ____, 128
What is 16?
200
This is the value of the first term when the 5th term is 512 and the common ratio is 4.
What is 2
300

Write the formula for the sequence: 4, 20, 100,  ....

an=4(5)n-1

300
This is the value of the 36th term when the 6th term is 11, the 18th term is 36, and the common difference is 3.
What is -186?
300

The current population in New City is 10,000. Every year, the population increases by 50 people. Write the formula to model the population.

an=10050+50(n-1)

300
Find the missing term in the following Arithmetic sequence. -13, ___ ,-27
What is -20?
300
This is the term number for the value of 81 when the first term is 3, the common ratio is 3, and n – 1 = 3.
What is 4
400

Write the formula for the sequence 375, 75, 15, 3, ...

an=375(1/5)n-1

400

This is the value of the 125th term when the 10th term is 15 and the 11th term is 27.

What is 1295?

400

The current amount in your bank account is $100. Every month you deposit $75 in the the account. Write the formula to model the amount in your account. 

an=175+75(n-1)

400
Find the missing terms in the following Arithmetic sequence. 10, ____, ____ , _____, 26
What is 14, 18, 22?
400
This is the common ratio when the 1st term is 2 and the 3rd term is 72.
What is 6