Viral math problem #18 9 = 72,8 = 56,7 = 42,6 = 30,5 = 20,3 = ?

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Can you solve it? 9 = 72
8 = 56
7 = 42
6 = 30
5 = 20
3 = ?

See the solution below.

The right answer is 6
Formula is: a = a×(a-1)
9 = 9×8 = 72
8 = 8×7 = 56
7 = 7×6 = 42
6 = 6×5 = 30
5 = 5×4 = 20
3 = 3×2 = 6

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The solution of this problem involves a lot of thinking. However, there are two solutions to this case.

Solution 1:
72/9=8 and 56/8=7. Notice how the result is always the number shown on the left minus 1. Therefore, 3(3-1)=6.

Solution 2: Lots of people are tempting to square each number, not knowing that it is the first step of another solution. Example: 9² = 81 and the difference of 81 and 72 is 9. Let's try that again: 6² = 36. Difference of 36 and 30 = 6.
You may notice that the difference of the numbers on the right are basically the square of the first number minus the first number itself. Therefore, 3² - 3 = 6.

simbahit
Автор

3*2=6
No. Ki multiply uske ek km se ho rhi h
Respect IIT Kanpur ❤❤

nirmalpaliwal