math quizizz

1. Which of the following is an arithmetic sequence?

• a. 1,2,3,5,7,9…

• b.  1,10,20,30…

• c. 1,-1,-3,-5…

• d. 7,-7,7,-7...

2. 3,-2,-7… is an arithmetic sequence. What is the common difference of the sequence?

• a. 1

• b. -5

• c. 5

• d. -1

3. a₁= 3 and a₂=7. Which is true?

• a. A_n = 4_n-3

• b. A_n =4_n-1

• c. A_n=4_n+3

• d. A_n=4_n+1

4. A₃=4 and a₅=14. What is the common difference?

• a. 6

• b. 5

• c. 4

• d. 3

5. If a₁=4 and the common is 3, then what is the sum of the first twenty terms of the sequence?

• a. 620

• b. 630

• c. 640

• d. 650

6. A₁=-3 and a₅=5. Find  a₁₀?

• a.  14

• b. 15

• c.  16

• d. 17

7. If a₃=11 and a₅=7 and a_k is the k-th term of the sequence and a_k=-9, then what is the value of k?

• a. 11

• b. 12

• c. 13 

• d. 14

8. If a_n=2_n-8, then which one is not a term of this sequence?

• a. 13

• b. 16

• c. 204

• d. 198

9. -7,-4,-1,2,5… is an arithmetic sequence. What is the common difference?

• a. -3

• b. 3

• c. 4

• d. -4

10. A_n=3_n+2 and b_n=2-3_n and C_n=A_n+b_n. Find C₄?

• a. -4

• b. 12

• c. 28

• d. 4