There are 20 stars .A quarter of them are red .How many stars are red ? how many are not red​

In the given figure, how many moving cars are not red ?

In three coloured boxes— Red, Green and Blue, 108 balls are placed. There are twice as many balls in the green and red boxes combined as there are in the blue box and twice as many in the blue box as there are in the red box. How many balls are there in the green box?

In a bag, white marbles and red marbles are in the ratio of 5:3 . If the number of red marbles are 150, then how many white marbles are there?

There are 3 white,4 blue and 1 red flowers. All of them are taken out one by one and arranged in a row in the order.How many different arrangements are possible (flowers of same colurs are similar)?