Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Solve the alphametic puzzle by replacing the alphabet with the number.

S T O R M +
S O L E S
=========
T O W E L
=========

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What has hands, but can’t clap?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

Can you find out who is the kidnapper in below Picture and why, Explain ?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

Can you tell a 3D object that has just two surfaces?

What is the word or phrase?