In the “Big-Reds” parking lot there are 56 vehicles, 18 of them are buses and the rest are private cars. The color of 32 vehicles is red, from which 17 are buses. How many private cars can be found in the parking lot, which are not colored red?

1.
23.
17.
15.
20.

The best answer is B.
Out of 56 vehicles, 32 are colored red, therefore 24 are in different color.
17 of the red vehicles are buses, therefore (18 – 17 = 1) are in different color.
(24 – 1 = 23) private cars are in the parking lot with a different color than red.



In Sam’s hanger there are 23 boxes, 16 out of the boxes are filled with toys and the rest are filled with electrical appliances. 8 boxes are for sale, 5 of them are filled with toys.  How many boxes with electrical appliances are in Sam’s hanger that are not for sale?

1.
2.
3.
4.
5.

The best answer is D.

8 boxes are for sale, 5 of them are with toys, and therefore 3 of them are with electrical appliances.
Out of 23 boxes, 16 are with toys, therefore, and therefore 7 of them are with electrical appliances.
(7 – 3 = 4) is the number of electrical appliances boxes, which are not for sale.