2024 Author: Malcolm Clapton | [email protected]. Last modified: 2023-12-17 03:44
Take a close look at the shapes and determine what needs to be substituted for the question mark.
– 1 –
Number 3.
In each column, the sum of the four numbers is 15. So, instead of the question mark, you need to substitute 15 - (4 + 5 + 3) = 3.
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– 2 –
Number 4.
To find the number in the center of a star, you need to calculate the arithmetic mean of the numbers located on its rays. (2 + 3 + 4 + 3 + 8) ÷ 5 = 20 ÷ 5 = 4.
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– 3 –
Number 71.
Each next number is formed by adding the previous two and subtracting 3 from the result.
3 + 5 − 3 = 5
5 + 5 − 3 = 7
5 + 7 − 3 = 9
7 + 9 − 3 = 13
9 + 13 − 3 = 19
13 + 19 − 3 = 29
19 + 29 − 3 = 45
29 + 45 − 3 = 71.
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– 4 –
Number 13.
To find the number in the center of a triangle, add those on its corners and divide the sum by 2. (8 + 5 + 3) ÷ 2 = 8; (7 + 9 + 8) ÷ 2 = 12. So, the lower right triangle lacks 14 × 2 - (11 + 4) = 28 - 15 = 13.
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– 5 –
Number 0.
To give the correct answer, you need to represent pairs of numbers as two-digit numbers. They are all multiples of 8.
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– 6 –
Number 2.
The sum of the four numbers in each square is 24. So, then we proceed as follows: 24 - (17 + 1 + 4) = 2.
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– 7 –
Number 7.
The numbers in the center column are the sum of the differences between the pairs of numbers on the right and left. (5 - 1) + (4 - 1) = 4 + 3 = 7.
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