daily use simple words

All the letters of the word 'AGAIN' be arranged and the words thus formed are known as 'Simple Words'. If a vowel appears in between two similar letters, the number of simple words is

Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to avoid the use of plastic as far as possible. Why?

Generally in children the simple principles of daily conduct are developed up to the stage of?

A ………………. Lens is used as a simple microscope .

What does a simple microscope consist of ? What is the order of magnification obtained by a simple microscope ? What is a simple microscope used for ?