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Number Sequences and Logic Puzzles

Test your skills with number pattern recognition, mathematical word problems, and logic puzzles

20 Questions Published
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Questions

Question 1 Multiple Choice (Multiple Answers)

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

  1. 10
  2. 11
  3. 19
  4. 20
Question 2 Multiple Choice (Multiple Answers)

One day Alice meets the Lion and the Unicorn in the Forest of Forgetfulness. She knows that the Lion lies on Mondays, Tuesdays, and Wednesdays, and tells the truth on the other days of the week. The Unicorn, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Alice: Lion: Yesterday was one of my lying days. Unicorn: Yesterday was one of my lying days too. What day is it?

  1. Sunday
  2. Monday
  3. Friday
  4. Thursday
Question 3 Multiple Choice (Multiple Answers)

Ronald and Michelle have two children. The probability that the first child is a girl is 50%. The probability that the second child is a girl is also 50%. Ronald and Michelle tell you that they have a daughter. The Question: What is the probability that their other child is also a girl?

  1. 33%
  2. 66%
  3. 50%
  4. 100%
Question 4 Multiple Choice (Multiple Answers)

Farmer Charlie has a chicken farm. On a certain day, Charlie calculates in how many days he will run out of chicken-food. He notices that if he would sell 75 of his chickens, he could feed the remaining chickens twenty days longer with the chicken-food he has, and that if he would buy 100 extra chickens, he would run out of chicken-food fifteen days earlier. Question: How many Chickens are there with Charlie?

  1. 300
  2. 60
  3. 330
  4. 630
Question 5 Multiple Choice (Multiple Answers)

One chicken lays two eggs in three days. How many eggs do three chickens lay in seven days?

  1. 21
  2. 14
  3. 28
  4. 7
Question 6 Multiple Choice (Multiple Answers)

Richard is a strange liar. He lies on six days of the week, but on the seventh day he always tells the truth. He made the following statements on three successive days: Day 1: "I lie on Monday and Tuesday." Day 2: "Today, it's Thursday, Saturday, or Sunday." Day 3: "I lie on Wednesday and Friday." On which day does Richard tell the truth?

  1. Monday
  2. Tuesday
  3. Thursday
  4. Saturday
Question 7 Multiple Choice (Single Answer)

Find the next number ??

  1. 64
  2. 60
  3. 68
  4. 62
  5. 72
  6. 70
Question 8 Multiple Choice (Single Answer)

Find the next number ??

  1. 20
  2. 10
  3. 19
  4. 18
  5. 45
  6. 15
Question 9 Multiple Choice (Single Answer)

Find the next number ??

  1. 25
  2. 30
  3. 26
  4. 29
  5. 27
  6. 28
Question 10 Multiple Choice (Single Answer)

Find the next number ??

  1. 56
  2. 59
  3. 57
  4. 58
  5. 55
  6. 60
Question 11 Multiple Choice (Single Answer)

Find the next number ??

  1. 2140
  2. 2130
  3. 2150
  4. 2160
  5. 2100
  6. 2120
Question 12 Multiple Choice (Single Answer)

Find the next number ??

  1. 36
  2. 6
  3. 20
  4. 26
  5. 16
  6. 10
Question 13 Multiple Choice (Single Answer)

Find the next number ??

  1. 10
  2. 4
  3. 5
  4. 7
  5. 8
  6. 6
Question 14 Multiple Choice (Single Answer)

Find the next number ??

  1. 30
  2. 10
  3. 15
  4. 5
  5. 25
  6. 20
Question 15 Multiple Choice (Single Answer)

Find the next number ??

  1. 91
  2. 41
  3. 81
  4. 61
  5. 51
  6. 71
Question 16 Multiple Choice (Single Answer)

Find the next number ??

  1. 18
  2. 19
  3. 17
  4. 20
  5. 16
  6. 14
Question 17 Multiple Choice (Single Answer)

1-5-9-13-?

  1. 20
  2. 17
  3. 26
  4. 14
  5. 31
Question 18 Multiple Choice (Single Answer)

1-2-5421-8-124-52-?

  1. 512
  2. 25
  3. 3
  4. 60
  5. 1
Question 19 Multiple Choice (Single Answer)

6-7-7-9-18-21-63-?

  1. 76
  2. 252
  3. 67
  4. 96
  5. 7
Question 20 Multiple Choice (Single Answer)

A-D-I-P-?

  1. W
  2. Q
  3. Y
  4. O
  5. R
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