Class 3 olympiad maths

Study the given pictograph which shows the number of balls collected by four friends and answer the following question;
Q. How many more balls were collected by Rita than Sita?

If 1 smile = 6 Girls. Then How many girls are there in this figure?

If a tank can hold 120 ltr of oil and it is 1/2 filled. Then how much  more oil needs to be poured to fill the tank?

If water Teacher is Doctor, Doctor is Barber, Barber is Carpenter, Then who cuts our hair?

In this number series, What will come after 78?

If water Teacher is Doctor, Doctor is Barber, Barber is Carpenter, Then who teaches us?

Rohit wants to change her 10 rupees note with 50 paise coins. How many coins will he get?

There are 55 students in class 3 of a reputed school. Their class teacher bought _____ number of chocolate, so that she can distribute 2 chocolate to each students.

How many triangles are there in the given picture?

Madhubala is Mohit's Father's Wife. Ranu is Mohit's Sister. How is Ranu related to Madhubala?