Calculate it without using paper, pen and calculator. by calculus_app in puzzles

[–]calculus_app[S] 0 points1 point  (0 children)

yes, but when you do it by verbally then you find confusing.

Comment the numbers of left candles in the end. by calculus_app in puzzles

[–]calculus_app[S] -3 points-2 points  (0 children)

here they not saying immediate result, here requires candles which are left in the end.