alleryStart learning →How many two-digit numbers are divisible by 3 (i.e. the AP 12, 15, …, 99)?
- 30
- 29
- 31
- 33
Show answer and solution
Correct answer: A. 30
AP 12,15,…,99: aₙ=12+(n−1)3=99 ⇒ n=30.
Indian Navy 10+2 B.Tech Cadet Arithmetic Progressions — practice questions
Explore 2 free Arithmetic Progressions questions in Indian Navy 10+2 B.Tech Cadet Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
Practise Arithmetic Progressions with Quill →Arithmetic Progressions questions and exercises with answers
Showing questions 1–2 of 2.
Worked practice questions
Sum the AP 2 + 4 + 6 + … + 100.
- 2550
- 2500
- 2600
- 5050
Show answer and solution
Correct answer: A. 2550
First term 2, last term 100, d = 2. Number of terms: n = (100 − 2)/2 + 1 = 50. Sum: 50/2 (2 + 100) = 25 × 102 = 2550.
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