Which is faster, Heat or Cold ? Explain.

Prove that twice of ten is the same as twice of eleven.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

You need to move three matchsticks to form three squares. Can you do it?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

I have branches, but no fruit, trunk or leaves. What am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?