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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If 7 times the 7th term of an AP is equal to 11 times its 11th term, then its 18th term will be(A) 7 (B) 11 (C) 18 (D) 0 |
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Answer» Correct answer is (D) 0 |
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| 2. |
Which term of the AP: 21, 42, 63, 84,... is 210?(A) 9th (B) 10th (C) 11th (D) 12th |
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Answer» Correct answer is (B) 10th |
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| 3. |
Find four numbers in AP whose sum is 8 and the sum of whose squares is 216. |
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Answer» (4, 6, 8, 10) or (10, 8, 6, 4) |
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| 4. |
Find the value of the middle most term (s) of the AP : –11, –7, –3,..., 49. |
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Answer» Solution : Here, a = –11, d = –7 – (–11) = 4, an = 49 We have an = a + (n – 1) d So, 49 = –11 + (n – 1) × 4 i.e., 60 = (n – 1) × 4 i.e., n = 16 As n is an even number, there will be two middle terms which are (16/2)th and(16/2+1)th i.e., the 8th term and 9th term. a8 = a + 7d = –11 + 7 × 4 = 17 a9 = a + 8d = –11 + 8 × 4 = 21 So, the values of the two middle most terms are 17 and 21, respectively. |
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| 5. |
The sum of first five multiples of 3 is(A) 45 (B) 55 (C) 65 (D) 75 |
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Answer» Correct answer is (A) 45 |
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| 6. |
Which of the following form an AP? Justify your answer.(i) –1, –1, –1, –1, ...(ii) 0, 2, 0, 2, ...(iii) 1, 1, 2, 2, 3, 3,...(iv) 11, 22, 33,...(v)1/2 ,1/3 ,1/4 , ...(vi) 2, 22, 23, 24, ... |
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Answer» (i), and(iv) form an AP as in each of these ak-1 ak is the same for different values of k. |
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| 7. |
Two APs have the same common difference. The first term of one of these is–1 and that of the other is – 8. Then the difference between their 4th terms is(A) –1 (B) – 8 (C) 7 (D) –9 |
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Answer» Correct answer is (C) 7 |
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| 8. |
In an AP, if a = 3.5, d = 0, n = 101, then an will be(A) 0 (B) 3.5 (C) 103.5 (D) 104.5 |
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Answer» Correct answer is (B) 3.5 |
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| 9. |
The first four terms of an AP, whose first term is –2 and the common difference is –2, are(A) – 2, 0, 2, 4(B) – 2, 4, – 8, 16(C) – 2, – 4, – 6, – 8(D) – 2, – 4, – 8, –16 |
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Answer» Correct answer is (C) – 2, – 4, – 6, – 8 |
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| 10. |
The sum of first 16 terms of the AP: 10, 6, 2,... is(A) –320 (B) 320 (C) –352 (D) –400 |
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Answer» Correct answer is (A) –320 |
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| 11. |
The famous mathematician associated with finding the sum of the first 100 natural numbers is(A) Pythagoras (B) Newton(C) Gauss (D) Euclid |
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Answer» Correct answer is (C) Gauss |
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