Question

i post maths questions on daily basis
if
4+4=20
5+5=30
6+6=42
7+7=56
then
9+9=

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if i got 10 followers i will post

at that movement only

Answer 1

Answer:

99

Step-by-step explanation:

add 1 with the second no. and multiple it

4+4=20

4*4+1

4*5=20 and so on

but u will add 2 with 9 because 8 is missing