Find the missing term: A, C, E, G, I, ?
Alternate letters of alphabet starting from A
Complete: 5, 10, 15, 20, 25, ?
Simple arithmetic sequence with common difference 5
Find next: 1, 1, 2, 3, 5, 8, 13, ?
Fibonacci sequence where each term is sum of previous two
Complete the series: 100, 50, 25, 12.5, ?
Each term is divided by 2. 12.25 = 6.25
Find the next: 2, 4, 8, 16, 32, ?
Geometric sequence with common ratio 2
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Complete: 1, 4, 9, 16, 25, 36, ?
Perfect squares: 1², 2², 3², 4², 5², 6², 7²
Find missing: 11, 22, 33, 44, 55, ?
Multiples of 11 in sequence
Complete the series: 2, 5, 10, 17, 26, ?
Pattern: Add 3, 5, 7, 9, 11... (odd numbers). 26 + 11 = 37
Find the missing number: 4, 9, 16, 25, 36, ?, 64
These are perfect squares: 2², 3², 4², 5², 6², 7², 8². Missing is 7² = 49
Complete: 1, 1, 2, 3, 5, 8, 13, ?, 34
Fibonacci sequence where each term is sum of previous two. 8 + 13 = 21
Find next term: 7, 14, 28, 56, 112, ?
Each term is multiplied by 2. 112 × 2 = 224
Complete: 1, 4, 9, 16, 25, ?, 49, 64
Perfect squares: 1², 2², 3², 4², 5², 6², 7², 8². Missing is 6² = 36
Find next: 3, 6, 12, 24, 48, ?
Each term doubles. 48 × 2 = 96
Find the pattern: 10, 20, 40, 80, 160, ?
Each term is multiplied by 2. 160 × 2 = 320
Complete: 2, 4, 8, 16, ?, 64, 128
Powers of 2: 2¹, 2², 2³, 2⁴, 2⁵, 2⁶, 2⁷. Missing is 2⁵ = 32
Complete the series: 5, 10, 20, 40, ?, 160
Each term is multiplied by 2. 40 × 2 = 80
Complete the series: 1, 2, 6, 24, 120, ?
Each term is the factorial of its position: 1!, 2!, 3!, 4!, 5!, 6! = 720
Find the next number: 5, 6, 8, 11, 15, 20, ?
Differences increase by 1 each time: +1, +2, +3, +4, +5, +6. So 20 + 6 = 26
Complete: 2, 5, 10, 17, 26, 37, ?
Pattern: n² + 1 for n = 1, 2, 3... gives 2, 5, 10, 17, 26, 37, 50
Find missing term: 144, 121, 100, 81, 64, ?
Squares in descending order: 12², 11², 10², 9², 8², 7² = 49
