Squaring the numbers having 5 at unit place #shorts #youtubeshorts #shorts #youtubeindia

A number ending in 9 will have the units place of its square as

Property 1 A number having 237 or 8 at units place is never a perfect square.In other words no square number end in 237 or 8.

Square of which of the following number will have 6 at its unit place ?

Which does not take place in short day plants ?

A number having 7 at its ones place will have 3 at the units place of its square. True or false.

(a) What is short-sightedness ? State the two causes of short-sightedness (or myopia). With the help of ray diagram, show : (i) the eye-defect short-sightedness. (ii) correction of short-sightedness by using a lens. (b) A person having short-sight cannot see objects clearly beyond a distance of 1.5 m. What would be the nature and power of the corrective lens to restore proper vision ?