Which tank will fill first?

Forwards I am heavy, backward I am not. What am I?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

In the image below, can you find the value of an angle(y)

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

How can you tell a raw egg from a hard-boiled egg?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?