alleryStart learning →A 12 m rope is cut into pieces that are each 2 m long. How many cuts are needed?
- 6
- 4
- 12
- 5
Show answer and solution
Correct answer: D. 5
There are 6 pieces, and the last cut yields two pieces at once, so only 5 cuts are needed.
Olympiad (Class 5) Logic Puzzle — practice questions — page 2
Explore 52 free Logic Puzzle questions in Olympiad (Class 5) Reasoning. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–52 of 52.
A 12 m rope is cut into pieces that are each 2 m long. How many cuts are needed?Read the answer and worked solution →A frog in a 5 m deep well climbs 3 m each day and slips back 2 m each night. On which day does it get out?Read the answer and worked solution →Boxes marked Apples, Oranges and Mixed are all mislabelled. An apple comes out of Mixed. What does it hold?Read the answer and worked solution →Three coins look alike but one is heavier. What is the fewest weighings on a balance needed to find it?Read the answer and worked solution →In a classic 9x9 sudoku, how many times does the digit 7 appear in each row?Read the answer and worked solution →How many 3x3 boxes make up a classic sudoku grid?Read the answer and worked solution →In a completed classic sudoku row, what do all nine digits add up to?Read the answer and worked solution →Eight cells of a sudoku row are filled and their digits add up to 40. Which digit is missing?Read the answer and worked solution →In which year did Dell Magazines first publish the modern sudoku puzzle under the name Number Place?Read the answer and worked solution →In the name sudoku, "su" means number. What does "doku" mean?Read the answer and worked solution →A 4x4 sudoku uses digits 1 to 4. One row reads 3, 1, blank, 2. Which digit fills the blank?Read the answer and worked solution →In a 4x4 sudoku with digits 1 to 4, a 2x2 box has 1 and 4 on top and 3 at bottom left. What is the bottom right?Read the answer and worked solution →A column of a 4x4 sudoku with digits 1 to 4 reads 4, 2, 3 from the top. What is the bottom cell?Read the answer and worked solution →In a 9x9 sudoku, a cell's row has 1, 2, 3, 4, its column has 5, 6, 7, and its box has 8. Which digit must go in it?Read the answer and worked solution →A mini sudoku grid with 4 rows and 4 columns is divided into boxes of which size?Read the answer and worked solution →A normal 3x3 magic square uses the numbers 1 to 9 once each. What is its magic constant?Read the answer and worked solution →In a 3x3 magic square with constant 15, a row reads 8, blank, 6. Which number fills the blank?Read the answer and worked solution →Which number sits in the centre of a normal 3x3 magic square made from 1 to 9?Read the answer and worked solution →Can 1, 2, 3 and 4 fill a 2x2 grid so all rows, columns and diagonals have equal sums?Read the answer and worked solution →One row of a magic square adds up to 15. What does each column add up to?Read the answer and worked solution →Magic squares date back to at least 190 BCE in which country?Read the answer and worked solution →In a magic square, which lines must all add up to the same sum?Read the answer and worked solution →
Worked practice questions
A frog in a 5 m deep well climbs 3 m each day and slips back 2 m each night. On which day does it get out?
- Day 2
- Day 4
- Day 5
- Day 3
Show answer and solution
Correct answer: D. Day 3
It ends day 1 at 1 m and day 2 at 2 m, then climbs to 5 m on day 3 and is out before slipping.
Boxes marked Apples, Oranges and Mixed are all mislabelled. An apple comes out of Mixed. What does it hold?
- Only apples
- It is empty
- Only oranges
- Mixed fruit
Show answer and solution
Correct answer: A. Only apples
The Mixed label is wrong, so the box holds one kind of fruit, and the apple shows it holds only apples.
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