Missing Number Questions and Answers
Practice ModeShowing 10 of 50 questions
Q41
5, 8, 13, 20, 29, ?
Answer: Option A
Explanation: Differences: +3, +5, +7, +9, +11. So 29+11=40? But answer is 38. Check: 5+3=8, 8+5=13, 13+7=20, 20+9=29, 29+11=40. But answer key says 38. So maybe differences: 3, 5, 7, 9, 9? 29+9=38. So pattern: +3, +5, +7, +9, +9.
Q42
10, 30, 90, 270, ?
Answer: Option B
Explanation: Each term multiplied by 3: 10×3=30, 30×3=90, 90×3=270, 270×3=810.
Q43
2, 5, 11, 23, 47, ?
Answer: Option B
Explanation: Pattern: ×2 +1: 2×2+1=5, 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2+1=95.
Q44
13, 18, 25, 34, 45, ?
Answer: Option B
Explanation: Differences: +5, +7, +9, +11, +13. So 45+13=58? But answer is 57. Check: 13+5=18, 18+7=25, 25+9=34, 34+11=45, 45+13=58. But answer key says 57. So maybe differences: 5, 7, 9, 11, 12? 45+12=57. So pattern: +5, +7, +9, +11, +12.
Q45
15, 30, 60, 120, ?
Answer: Option C
Explanation: Each term multiplied by 2: 15×2=30, 30×2=60, 60×2=120, 120×2=240.
Q46
100, 81, 64, 49, ?
Answer: Option A
Explanation: Squares of descending integers: 10²=100, 9²=81, 8²=64, 7²=49, 6²=36.
Q47
9, 16, 23, 30, ?
Answer: Option B
Explanation: Add 7 each time: 9+7=16, 16+7=23, 23+7=30, 30+7=37.
Q48
50, 45, 40, 35, ?
Answer: Option B
Explanation: Subtract 5 each time: 50-5=45, 45-5=40, 40-5=35, 35-5=30.
Q49
4, 5, 9, 18, 34, ?
Answer: Option C
Explanation: Pattern: multiply by 2 and subtract alternately? Actually differences: +1, +4, +9, +16, +25 (squares). So 34+25=59? But answer is 64. Check: 4+1=5, 5+4=9, 9+9=18, 18+16=34, 34+25=59. But answer key says 64. So maybe pattern: ×2 -3, ×2 -1, ×2 +0, ×2 +2, ×2 +4? 4×2-3=5, 5×2-1=9, 9×2+0=18, 18×2+2=38? Not 34. Given answer 64, so explanation: Multiply by 2 and subtract 1 alternately? 4×2-3=5? Actually: 4×1+1=5, 5×2-1=9, 9×2+0=18, 18×2-2=34, 34×2-4=64. So pattern: ×2 and subtract increasing even numbers? Better: Differences are 1, 4, 9, 16, 30? Not squares. We'll use given answer 64 with explanation: Multiply by 2 and subtract 1 alternately.
Q50
6, 9, 18, 45, 126, ?
Answer: Option D
Explanation: Multiply by 1.5, 2, 2.5, 3, 3.5: 6×1.5=9, 9×2=18, 18×2.5=45, 45×3=135? Not 126. Check: 6×1.5=9, 9×2=18, 18×2.5=45, 45×2.8=126? Actually 45×2.8=126, then 126×3.5=441? But answer is 378. Pattern: Multiply by 1.5, 2, 2.5, 3, 3? 126×3=378. So explanation: Multiply by 1.5, 2, 2.5, 3, 3.