What's the answer of this cube?

20

Let me explain
As we can see that the first line is
3 15 10
= 3 x 5 = 15
15 -5 = 10

Another line is also same

8 x 5 = 45
45 - 5 = 30


So, ...............
5 x 5 = 25
25 - 5 = 20

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Answer is =20
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Answer is 20
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It's 25 because 5+3 =8
25 +15=40
10+25=35
The sum of upper and lower number is equal to the middle number.
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Ans is 20
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Answer is 25.

As, add the top and bottom numbers in each column and get the total which is,

3 plus 5 is 8, 15 plus 25 is 40 l, 10 PLUS 25 IS 35.

Regards
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15?3=5
15-5=10

40?8=5
40-5=35

25?5=5
25-5=20

Ans:20
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