Question

If $324\times 150=54,251\times 402=48$ and $523\times 345=120,$ then $651\times 345=?$

• A. $120$
• B. $85$
• C. $144$
• D. $60$

Answer 1

Answer: (C)

$144$

$324\times 150$ means $(3+2+4)\times (1+5+0)=54$
$251\times 402$ means $(2+5+1)\times (4+0+2)=48$
Same as
$651\times 345$ means $(6+5+1)\times (3+4+5)=144$
Hence, option $C$ is answer.