Which tool is used to see objects too small to be seen with the human eye?
a. telescope
b. microscope
c. spectrometer
d. chromatograph

The answer is b. microscope.

A microscope is an optical instrument used to see objects invisible to the human eye. There are different types of microscopes - optical microscope, transmission electron microscope, scanning electron microscope, scanning probe microscope, ultramicroscope. 

Img()3! : $3! : ! ? : $ sugz

If there are four friends then each would get, 1.25 or 1 1/4. so this is how i solved 5 ÷ 4 = 1.25 . hope this ; )