Questions

Stamps are what travel around the worldstaying in one spot. Slippers and walking stick can also travel around the world but they will not stay at one spot. So they are eliminated.

Pages are denoted as 

1 - 9 = 09

10 - 99 = 90*2 = 180

100 = 03

Hence, total number of digits = 09 + 180 + 03 = 192.

Project Management is the application of Knowledge, skills, tools and techniques to project activities to meet project requirements. Project Management is accomplished through the application and integraton of the project management processes of  initiating, planning, executing, monitoring and controlling , closing.

The alphabet 'B' resembles same as a fly 'Bee' in pronouncing.

Accoustics is a subject deals with the Study of sound

Aesthetics is a Philosophy of fine arts

The science or art of flight is called Aeronautics

The science of soil management is called Agronomy.

Cretinism is a disease caused by hypothyroidism(less thyroxine formation).The symptoms of the disease are retardation  of mental, physical and sexual developments. Potbellt, protruding tongue, dry skin etc are also indicative of this disease.

Oxygen in our blood is transported by a protein named Haemoglobin.

The "aha!" experience is known as insight learning.