Class 3 olympiad maths

In this number series, What will come after 78?

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?

Observe the figure carefully. There are certain number of boys and girls had eaten different types of foods as shown in this image. How Many Girls had eaten Chocolate, Pizza and ice-cream all together?

If perimeter of a square is 44 meter, Then what is the length of one side of the square?

Indra introduces Praveen as the son of the only brother of his father's wife. How is Praveen related to Indra?

There are _________ Triangles in this picture?

One fine evening, Mugdha & Ankita were talking to each other face to face. If Ankita's shadow was exactly to the right of Ankita, Which direction was Mugdha facing?

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

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

Find the missing number to complete this equation.
? + 122 + 78 + 35 = 269