Practise Series Completion MCQs in Maths. Attempt multiple-choice questions, check answers and revise related subtopics.
Study Series Completion through multiple-choice questions in Maths. This subtopic contains 539 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
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Answer: 13
Explanation 48 → 45 (−3) 45 → 40 (−5) 40 → 33 (−7) 33 → 24 (−9) Now continue the pattern: next difference should be −11 24 − 11 = 13
Answer: -3
Explanation Given sequence: -8, -5, -2, ..., 7 We have: a = -8 (first term) d = 3 (common difference) Let 7 be the nth term Using the formula: tn = a + (n - 1) d 7 = -8 + (n - 1) 3 Solving for n: 15 ÷ 3 = n - 1 n = 6 Now we have: a = -8 d = 3 n = 6 Substituting these values in the formula for sum: S₆ = (6/2) × [2 × (-8) + (6 - 1) × 3] = (6/2) × [-16 + 15] = 3 × -1 = -3 Therefore, the sum of the given sequence is -3.
Answer: 50
Explanation 350 - 300 = 50
Answer: 29
Explanation Let's examine the sequence: 1, 5, 11, 19, k, 41, 55 The differences between consecutive terms are: +4 (5 - 1) +6 (11 - 5) +8 (19 - 11) The pattern of differences is increasing by 2 each time (+4, +6, +8, ...). If this pattern continues: +10 would be the next difference (19 + 10 = 29) So, k = 29 .
Answer: 4
Explanation A 4 The pattern in the sequence appears to be alternating between two sets of numbers. The sequence is: 7 3 8 3 4 2 4 7 If we break it into two sets: Set 1: 7 8 4 Set 2: 3 3 2 7 If we alternate between these two sets, the next number in the sequence would be from Set 1. Therefore, the next number is 4. So, the complete sequence is: 7 3 8 3 4 2 4 7 4.
Answer: 34
Explanation the integers are consecutive, the middle integer must equal the “average”, or 102/3 = 34. Therefore, the integers are 32, 34, and 36. let three consecutive integers= x ,x+1,x+2 According to condition X+(x+1) +( x+2)=102 3x+ 3= 102 3x= 102-3 3x= 99 X= 99/3 X = 33 X+1= 33+1 X+1= 34 X+2= 34+2 X+2= 36 33, 34, 36 answer ***** ND04-12-2022
Answer: 2.5
Explanation By observing the pattern: 18 → 10 (subtract 8) 10 → 6 (subtract 4) 6 → 4 (subtract 2) 4 → 3 (subtract 1) 3 → ? Following the pattern of halving the subtraction amount, the next step would be subtracting 0.5 , giving: 3 - 0.5 = 2.5
Answer: 4.7
Explanation In this simple addition series, each number increases by 0.8. Rule = (1st no.) (1st no. + 0.8 = 2nd no.) (2nd no. + 0.8 = 3rd number) Now (1.5) (1.5 + 0.8 = 2.3) (2.3 + 0.8 = 3.1) (3.1 + 0.8 = 3.9) (3.9 + 0.8 = 4.7) a = 4.7 ND-21-5-2023
Answer: 49
Explanation The sequence consists of perfect squares . The n-th term of the sequence is ((n+2)^2. 3*3 = 9 4*4 = 16 5*5 = 25 6*6 = 36 7*7 = 49
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Answer: 32
Explanation 20+5=25 25-2=23. 23+5=28. 28-2= 26 26 + 5 = 31 31 - 2 = 29 29 + 5 = 34 34 - 2 = 32 ND18-9-2023
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