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13., , 14., , 15., , 16., , 17., , 18., , 19., , 20., , 21., , 22., , 23., , 294, , 26., , , , An AP 5, 12,19, ... has 50 terms. Its last term is [CBSE 2015], (a) 343 (b) 353 (c) 348 (d) 362, , The sum of first 20 odd natural numbers is [CBSE 2012], (a) 100 (b) 210 (c) 400 (d) 420, , The sum of first 40 positive integers divisible by 6 is [CBSE 2014], (a) 2460 (b) 3640 (c) 4920 (d) 4860, , How many two-digit numbers are divisible by 3? [CBSE 2012], (a) 25 (b) 30 (c) 32 (d) 36, , How many three-digit numbers are divisible by 9? [CBSE 2013], (a) 86 (b) 90 (c) 96 (d) 100, , What is the common difference of an AP in which jg — a)4 = 32?, (a) 8 (b) -8 (c) 4 (d) -4, , If a,, denotes the nth term of the AP 3, 8, 13, 18, ... then what is the value, , Of (@39 — Ao)?, (a) 40 (b) 36 (c) 50 (d) 56, , Which term of the AP 72, 63, 54, ... is 0?, (a) 8th (b) 9th (c) 10th (d) 11th, , Which term of the AP 25, 20, 15, ... is the first negative term?, (a) 10th (b) 9th (c) 8th (d) 7th, , Which term of the AP 21, 42, 63, 84, ... is 210?, (a) 9th (b) 10th (c) 11th (d) 12th, , What is 20th term from the end of the AP 3, 8, 13, ..., 253?, (a) 163 (b) 158 (c) 153 (d) 148, , 24. (6+13+21+...+181) =?, (a) 2476 (b) 2337 (c) 2219 (d) 2139, Secondary School Mathematics for Class 10, 25. The sum of first 16 terms of the AP 10, 6, 2, ... is, , (a) 320 (b) -320 (c) -352 (d) -400, , How many terms of the AP 3, 7, 11, 15, ... will make the sum 406?, (a) 10 (b) 12 (c) 14 (d) 20, , 27., , 28., , 29., , The 2nd term of an AP is 13 and its 5th term is 25. What is its 17th term?, , (a) 69, The 17th term of a, difference of the AP, , (a) 3, , (b) 73, , (b) 2, , (c) 77 (d) 81, n AP exceeds its 10th term by 21. The common, is, , (c) -3 (d) -2, , The 8th term of an AP is 17 and its 14th term is 29. The common, , difference of the AP, (a) 3, , (b) 2, , is, , (¢) 5 (d) -2, , 30. The 7th term of an AP is 4 and its common difference is —4. What is its, first term?, (a) 16 (b) 20 (c) 24 (d) 28, ANSWERS (MCQ), l(c) 2(d) 3.(d) 4 (c) 5.(b) 6 (a) 7. (b) 8. (c) 9 (d), 10. (b) 11. (c) 12.(b) 13.(c) 14.(c) 15.(c) 16.(b) 17.(d) 18. (a), , 19. (c) 20.(b) 21. (d) 22. (b), , 28. (a) 29. (b) 30. (d), , 23. (b) 24.(d) 25. (b) 26.(c) 27. (b)