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Maths Percentage Riddle

I guess 76.8% readers will like this riddle.

What's the least number of people should read this post ?

Trick Maths Riddle

I have a role of cloth 1km long.
I have a machine which cuts this role into pieces of 10 meter long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs ?

Count The Number Of Lines Riddle

Can you count the number of lines in the riddle

Logical Clock Problem

Time in a digital clock can be palindromic like 01:10 (same when read forwards or backwards).

Whats the minimum interval between 2 times that are palindromic ?

Michael Phelps Maths Problem

Michael Phelps , the famous swimmer can swim downstream in a lake in exact 40 minutes (with the lake current helping time).
He can swim upstream in a lake in exact 60 minutes (against the lake current).
The length of lake is 2 kilometers.

How long Michael Phelps can cover distance of one side at a still lake (no current).