Puzzles number

 

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Number puzzle

Question 1
A
6
B
47
C
2
D
21
Question 1 Explanation: 
Looking at the diagram in rows, the central circle equals half the sum of the numbers in the other circles to the left and right of the centre.

Question 2
A
45
B
20
C
16
D
41
Question 2 Explanation: 
Moving clockwise, around alternate segments in the chain, one sequence decreases by 1, 2, 3 and 4 each time, while the other increases by 2, 3, 4 and 5.

Question 3
A
53
B
97
C
4
D
50
Question 3 Explanation: 
In each row of the diagram, the sum of the left and right hand digits, minus the central digit is always 8.

Question 4
A
8
B
29
C
28
D
11
Question 4 Explanation: 
Divide the circle, horizontally and vertically, to give 4 quarters. The sum of the numbers in the segments of each quarter equals 11.

Question 5
A
5
B
44
C
36
D
6
Question 5 Explanation: 
Working through the diagram in rows, and reading each row as a whole number, the diagram represents a subtraction sum : 203 - 7 = 196

Question 6
A
14
B
85
C
39
D
3
Question 6 Explanation: 
Moving from left to right, add 6 to the first number to get the next one along, then 8, 10 and 12 to complete the sequence.

Question 7
A
6
B
40
C
16
D
47
Question 7 Explanation: 
Starting with the top left number, and working down one row at a time, alternating between left and right, double the number each time. Repeat this sequence, starting with the top right number.

Question 8
A
1
B
18
C
36
D
22
Question 8 Explanation: 
Numbers in segments of the central circle equal the difference between the sum of the numbers in corresponding segments of the left two and right two circles.

Question 9
A
16
B
35
C
71
D
2
Question 9 Explanation: 
Working in columns, starting with the top number, add 4 to give the next value down, and add 5 to give the one under that.

Question 10
A
11
B
21
C
56
D
43
Question 10 Explanation: 
In each star, add together the top 3 numbers, and subtract the lower 2 numbers, to give the value in the centre of each star.
There are 10 questions to complete.

 

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