NCERT Mathematics Class 10 Exemplar Ch 5 Arithmetic Progressions Part 4

Doorsteptutor material for CBSE is prepared by world's top subject experts: fully solved questions with step-by-step explanation- practice your way to success.

EXERCISE 5.3

1. Match the APs given in column A with suitable common differences given in column B.

Column A

(A1)

(A2)

(A3)

(A4)

Column B

(B1)

(B2) – 5

(B3) 4

(B4) – 4

(B5) 2

(B6)

(B7) 5

Answer: (A1) β†’ (B4)

(A2 ) β†’ (B5 )

(A3 ) β†’ (B1 )

(A4 ) β†’ (B2 )

2. Verify that each of the following is an AP, and then write its next three terms.

(i)

(ii)

(iii)

(iv)

(v)

Answer: (i)

(ii)

(iii)

(iv)

(v)

3. Write the first three terms of the APs when a and d are as given below:

(i)

(ii)

(iii)

Answer: (i)

(ii)

(iii)

4. Find a, b and c such that the following numbers are in AP:

Answer:

5. Determine the AP whose fifth term is 19 and the difference of the eighth term from the thirteenth term is 20.

Answer:

6. The 26th, 11th and the last term of an AP are 0, 3 and – 1/5 , respectively. Find the common difference and the number of terms.

Answer:

7. The sum of the 5th and the 7th terms of an AP are 52 and the 10th term is 46. Find the AP.

Answer:

8. Find the 20th term of the AP whose 7th term is 24 less than the 11th term, first term being 12.

Answer: 126

9. If the 9th term of an AP is zero, prove that its 29th term is twice its 19th term.

10. Find whether 55 is a term of the AP: or not. If yes, find which term it is.

Answer: Yes, 17th term.