If 412 = 6; 133 = 12; 523 = 16; 654 = 50 then 157 = ?

Question

When multiplied by itself, which number is equal to 12,345,678,987,654,321?

A: 1,111,111
B: 111,111,111
C: 11,111,111,111
D: 111,111,111,111

Answer 1

40

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412 = (4+2)*1=6;
133 = (1+3)*3=12;
523 = (5+3)*2=16;
654 = (6+4)*5=50
157 = (1+7)*5=40

Answer 2

157 = (1+7) * 5 = 8*5 = 40

Ans: 40
By Ulhas Shinde