Arithmetic Progression

1. If the 5th term of an AP is 47 and the 10th term is 92, what is the first term?

• 3

• 22

• 2

• 18

2. In an AP, the sum of the first 20 terms is 1210. If the first term is 12, what is the common difference?

• 5

• 4

• 3

• 2

3. The nth term of an AP is given by an=7n−5. What is the 25th term?

• 165

• 170

• 160

• 180

4. A person saves ₹300 in January, ₹360 in February, ₹420 in March, and so on. What will he save in December?

• ₹1380

• ₹1410

• ₹1440

• ₹1350

5. The 12th term of an AP is 89 and the 5th term is 45. Find the common difference.

• 6.2

• 5

• 8

• 6.3

6. If the first term of an AP is 9 and the 21st term is 117, what is the sum of the first 21 terms?

• 1260

• 1314

• 1323

• 1287

7. Which term of the AP: 4, 10, 16, ..., is 100 more than its 8th term?

• 24th

• 25th

• 26th

• 27th

8. If the 6th term of an AP is twice the 3rd term and the 9th term is 45, what is the 1st term?

• 5

• 6

• 4

• 3

• 113

• 103

• 105

• 101

10. The 15th term of an AP is 62 and the common difference is 3. Find the 1st term.

• 17

• 20

• 18

• 19