Crack Your Brain

Crack Your Brain  IF            4   +   4   =   20                 5   +   5   =   30                 6   +   6   =   42                 7   +   7   =   56 THEN    9   +   9   =   ??

Crack Your Brain

IF            4   +   4   =   20
5   +   5   =   30
6   +   6   =   42
7   +   7   =   56
THEN    9   +   9   =   ??

Thinker Asked on September 13, 2016 in Number Puzzle.
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3 Answer(s)
Best answer

Answer : 90

logic is A * (A + 1)

9 * (9 + 1) = 90

[quads id=”1″]

Supeman Answered on September 13, 2016.
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90,. A^2+A or B^2+B

Thinker Answered on September 13, 2016.
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The answer is 74

4+4 = 20 , 5+5 = 30, 6+6 = 42, 7+7 = 56, 9+9 = ???

4+4 =8 next is 8+ 12 = 20. take this 20 to next level

5+5 = 10 add 20 from previous level to this level

now,

(5+5= 10)

10+ 20 = 30 (5+5 = 30)

like this add the previous level answers to next

like

(6+6=12)

12+30 (from previous)= 42 (6+6 = 4)

7+7=14

14+42= 56 ( 7+7 = 56

so now

9+9 = 18

add 56 from previous

18+56= 74

9+9 =74

Born Answered on September 19, 2016.
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