© 2008  Rasmus ehf  and Jóhann Ísak Pétursson

Sequences and Series - Test 3

 

Instructions to students.

Read each question carefully and put a check mark by the answer you think is correct. Note that there is only one correct answer to each question. When you have answered all the questions push the send button.

 

1.  Find the sum of the arithmetic series 1 + 2 + 3 + ∙ ∙ ∙ ∙ ∙ + 50.

Mark here

Possible answers:

A

1200

B

1225

C

1250

D

1275


2.  Find the sum of all positive two digit odd numbers less than 70.

Mark here

Possible answers:

A

1200

B

1225

C

1250

D

1275

 

3.  Find the sum of all numbers between100 and 200 that are divisible by 12.

Mark here

Possible answers:

A

1200

B

1225

C

 1250

D

1275

4.   Find the sum of the first 25 terms in an AP where  a10 = 37 and a20 = 57.

Mark here

Possible answers:

A

1000

B

1025

C

1050

D

1075

 

5.  Use the sigma notation to describe the series  4 + 6 + 8 + 10 + 12 = 40.

Mark here

Possible answers:

A

B

C

D
      
6. 

Mark here

Possible answers:

A

145

B

146

C

147
D

148

 


7.   Given an AP with a3 = 6 and a5 = 8.
       Which of the following could be the sigma notation for the sum of this sequence of numbers? 

Mark here

Possible answers:

A

B

C

D

 

 


8.   How many terms of the series  1 + 2 + 3 + ∙ ∙ ∙ ∙ ∙  are needed to give a sum of  465?

Mark here

Possible answers:

A

10

B

20

C

30

D

40

 

 

 

9.   How many terms of the arithmetic series  4 + 8 + 12 + ∙ ∙ ∙ ∙ ∙ are needed for the sum to excede 800?

Mark here

Possible answers:

A

10

B

20

C

30

D

40

 

 

10.  For what value of n is the following statement true?
       

Mark here

Possible answers:

A

10

B

20

C

30

D

40

 

 

Percentage answered correctly =

Correct answers: Your answers: