Help with this: Find the missing numbers?? Multiplication problem.

Formula: _7 x 6_
171+3420
Answer: 3591

I have to figure out the missing numbers in this product formula. >.<
I'm so STUCK!!

I don't understand the question. How do the _7 x 6_ relate to the 171 + 3420??

Is it _7 x 6_ + 171 + 3420 = 3691???

I hope you don't make all your decisions this perversely!

If anyone deserved BA, it was ranjankar. He gave an airtight, algorithmic way to the solution.

Report Abuse

Looks like the hints here are
171 + 3420
171 = 3*57; 3420 = 60*57
so
171 + 3420 = (60 + 3)*57 = 63*57 = 57*63

and

3591 = 3600 - 9
= 60^2 - 3^2
= (60 - 3)*(60 + 3)
= 57*63

LET THE DIGITS BE X7 x 6y = 3591

7y should end in 1

y = 3

X7 x 63 = 3591

X7 = 3591/63 = 57


X = 5

ANSWER 57 X63

57x63