If $11 \times 11 = 4$ $11xx11=4$ and $22 \times 22 = 16$ $22xx22=16$ , what is $33 \times 33$ $33xx33$ ?

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Answer 1 · 2016-09-18T12:00:17

18

Given:

$11 \times 11 = 4, 22 \times 22 = 16$ $11xx11=4, 22xx22=16$ , what is $33 \times 33$ $33xx33$

Here goes:

$11 \times 11 = 121$ $11xx11=121$ , $1 + 2 + 1 = 4$ $1+2+1=4$

$22 \times 22 = 484$ $22xx22=484$ , $4 + 8 + 4 = 16$ $4+8+4=16$

and so:

$33 \times 33 = 1089$ $33xx33=1089$ , $1 + 0 + 8 + 9 = 18$ $1+0+8+9=18$

If 11×11=411xx11=4 and 22×22=1622xx22=16, what is 33×3333xx33?