Question

Dave and Rachel both start with the same number.

Dave rounds to 1 significant figure.
Rachel rounds to 2 significant figures.
Rachel's number is now 30% more than Dave's number.

What could they have started on?
71
259
12.6
1.72
1349
None of these

Answer 1

Denise then told Albert, Bernard and Cheryl separately the month, the day and the year of her birthday respectively.

Albert: I don’t know when Denise’s birthday is, but I know that Bernard does not know.

Bernard: I still don’t know when Denise’s birthday is, but I know that Cheryl still does not know.

Cheryl: I still don’t know when Denise’s birthday is, but I know that Albert still does not know.

Albert: Now I know when Denise’s birthday is.

Bernard: Now I know too.

Cheryl: Me too.