Answer key Mathematics 10 Summative Test 1

1. Which of the following is NOT true about a sequence?
answer: A sequence is a list of number in ascending order.
2. What is the 6th term of the sequence 5, 8, 11, 14, …?
answer: 20
3. Which of the following gives the 10th term of the sequence with general formula given below?
answer: 51
4. Which of the following is the general formula of the sequence – 2, 1, 4, 7,...? *
answer: [tex]A_{n} =3n - 5[/tex]
5. What are the next three terms of the sequence 1, 1, 2, 4, 3, 9, …?
answer: 4, 16, 5
6. Which of the following general formulas has an 8th term equal to 15?
answer: [tex]A_{n}= 2n-1[/tex]

7. Which of the following is NOT an arithmetic sequence?
answer: 3, 6, 12, 24,
8. Which of the following is TRUE about an arithmetic sequence?
answer: In an arithmetic sequence, the next term is obtained by adding a constant number.

9. Which of the following is the common difference of the arithmetic sequence 18, 11, 4, -3, …?
answer: -7
10. Which of the following is the first positive term of the arithmetic sequence -8, -6, -4, …?
answer : 2
11. Which of the following is NOT true about the arithmetic sequence 5, 3, 1, -1, -3, …?
answer : The second term is -3.
12. I was advised by my physician to walk each day in the morning as my daily exercise. On my first day, I walked 50m. On the second and third day, I walked 70m and 90m, respectively, and so on. Which of the following is the distance I walked on the 10th day if I continue the pattern in my daily walk?
answer: 230 m