Which of the samples did not shine even after you cleaned them with sand paper ?

All the student of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the student. Which of the following statistical measures will not change even after the grace marks were given?

Sand in water , salt water , oil in water , stones in grains , mixture of colours .From which mixture in the examples mentioned above, are you able to separate components?

In the given picture there is a lime water in A and B test tubes. A boy is breathing out the air into the test tubes. Predict your answers for the following : In which test tube did the lime water turn milky after you blew in and sucked out air ?

Is water clean after the mud water is sieved with filter paper?

Which one is not oxidized after cutting them?

Latha saw an Electrical line man on the electrical pole, he is rubbing electric wire with a sand paper. She asked him ''why are you rubbing the wire, with sandpaper?'' What answer could be expected you from the line man?

Pictures of different kinds of plants and animals which live in ponds and lakes in our surroundings are given below for you. Try to know their local names with the help of your teacher and write them in your note book.

Karthik saw a cucumber plant in the kitchen garden. He identified two types of flowers - some flowers had a small swollen structure behind them while some did not. He removed all the flowers which did not have the swollen structure behind them thinking that they were of no use. Which flowers did he remove?

Karthik saw a cucumber plant in the kitchen garden. He identified two types of flowers - some flowers had a small swollen structure behind them while some did not. He removed all the flowers which did not have the swollen structure behind them thinking that they were of no use. What are the flowers which had a small fruit behind them?