Question

1+2=5 then 5+8=? try it

Answer 1

1 + 2 = 1 + ( 2 + 2 ) = 5
5 + 8 = 5 + (8 + 8) = 5 + 16 = 21 .

Hope helped!

Answer 2

hye

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aim :1+2=5 then 5+8=?

there is a pattern behind it...............

many get confused 1+2 = 5.how? here 

=>1 +(2×2) = 5

=>1+4 = 5

=>5=5

we see that we have to add the square of the second number with the first one

in the same way

=>5+8=?

=>5 + (8×8) = 

=>5+64

=>69

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hope it helps u.................