
Arithmetic & Geometric Progressions
Arithmetic Progression, Geometric Progression, Harmonic Progression: Definition, Arithmetic Progression Formula, Geometric Progression Formula, Solved Problems

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Online Aptitude Questions with Answers on Arithmetic & Geometric Progressions
Q16. **Find the sum of the first 12 odd natural numbers.**
- 280
- 180
- 320
- 144
Solution : 144
Q17. **Find the sum: 13 + 15 + 17 + ..... + 47**
- 120
- 230
- 220
- 540
Solution : 540
Q18. **How many terms of the series 230 + 227 + 224 + .... make a sum of 4200 ?**
- 20
- 21
- 32
- 43
Solution : 21
Q19. **Find three numbers in A.P such that their sum is 21 and the sum of their squares is 179**
- 3,5,7
- 5,9,13
- 6,13,20
- 3,7,11
Solution : 3,7,11
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Q20. **In an A.P., the 7th and 9th terms are 16 and 20 respectively. Find the nth term**
- 2(n+1)
- 2(n+2)
- 2n
- n+4
Solution : 2(n+1)
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Solution :
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