⁞ Number Puzzle
Puzzles ➤ Number Puzzle ➤ 1
Question 31
Q31. Which number replaces the question mark?
Answer : 51
Moving to the right, double each number and subtract 3 to give the next number along.
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Question 32
Q32. Which number replaces the question mark?
Answer : 2
Starting with the 10 at the top, one set of numbers increases by 3 each time, written in alternate boxes as you move down the diagram, and the other set of numbers decreases by 2, written in the boxes remaining.
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Question 33
Q33. Which number replaces the question mark?
Answer : 6
On each row, add the values of the left hand and central boxes to give the value in the right hand box.
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Question 34
Q34. Which number replaces the question mark?
Answer : 10
In each star diagram, the number in the centre equals the sum of the top three numbers, subtracting the sum of the bottom two numbers.
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Question 35
Q35. Which number replaces the question mark?
Answer : 23
Starting top left, and moving down in columns from left to right, the numbers follow the sequence of Prime Numbers from 2 to 23.
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