If the product of two whole numbers is zero, can we say that one or both of them will be zero?

Question

Kirti and Preeti are liars. They both lie on some specific days.

Kirti lies of Fridays, Saturdays and Sundays. She speaks truth on all other days.

Preeti lies on Tuesdays, Wednesdays and Thursdays. She speaks truth on all other days.

Can you tell that one day of the week when both of them will say "Tomorrow, I will lie."?

Answer 1

If a×b=0
Then the conclusions are
1) a=0, b= any non zero integer.
2) case 1 with a and b switched.
3) both are 0.

Answer 2

one no only will be zero;if both nos are zero the result will be infinitive

Comments

Multiplication can be translated to addition in the following way.
For instance 2*3 = 6
This can be written in its additive form as
2*3=6=2+2+2 (2 added three times)
Or 3*2= 3+3 (3 added twice)
Both statements are equally valid

Similarly 3*0=0 (It's 3 added 0 times not even once so starting from zero the sum remains at 0)

And 0*0 means 0 added 0 times which is zero.

So clearly 0*0 can't be infinite.

Answer 3

Only when ONE number is ZERO.
0 x 0 = Indeterminate

Comments

Try it out in a calculator.