One crate has oranges. Someone takes out half of all the
oranges plus one half of one orange. Later on, another person
takes out half of the remaining amount and one half of one
orange. Finally, someone takes half of the new remaining
amount and one half of one orange. After all this, 3 oranges
are left in the crate. How many oranges were in the crate at
the beginning?
3. A stationery store had a batch of ball pens. One half and 7 more pens were sold on the first day. One half of the remaining part but 4 fewer pens were sold on the second day. Finally, 1 8 ball pens are left. How many ball pen(s) did the stationery store have originally?
Một cửa hàng văn phòng phẩm có một số bút bi. Một nửa và 7 chiếc bút nữa được bán trong ngày đầu tiên. Một nửa số bút còn lại nhưng ít hơn 4 chiếc được bán trong ngày thứ hai. Cuối cùng, cửa hàng còn lại 18 chiếc bút. Hỏi ban đầu cửa hàng có bao nhiêu chiếc bút bi?
4 điểm
A.70
B.68
C.66
D.64
If one - half of a number is 8 less than two - thirds of the number, what is the number?
Mark gives John half of his books. John gives Tim half of his books. Tim gives Mark half of his books. Finally Mark has 25 books. How many books does John have left?
A bag contains indentical balls of different colours.There are 12 red, 10 white, 8 yellow, 3 blue and 2 black balls.Without looking into the bag,John takes out the balls one by one.What is the least number of balls that John must take out from the bag in order to have at least 4 balls of the same colour?
1: the perimeter of a circle is 15,7 dm. Its's area is...cm2
2: the ratio of the number of girls to the number of boys in a classroom is 5:4. When 10 girls left the classroom, the ratio of the number of boys to the number of girls became 4:3. How many students were in the classroom at first?
3: 47/250 dm3=...cm3
4: At the party 60% of the boys are dancing with 80% of the girls. How many people are dancing if there are 35 people ( A pair cludes only one boy and one girl)
5: An aquarium is 8dm deep, 12 dm long and 0,3 m wide. What is the volume of the aquarium in cubic centimeter?. Answer: the volume of the aquarium is...cm3
It takes 5 minutes to fry a pancake. One side of the pancake takes 3 minutes to fry and the other side takes only 2 minutes. Two pancakes can be placed on the frying pan at a time. What is the shortest time to fry all five pancakes???
A rectangle with a length and a half in width. If each dimension is added 2m new rectangle with additional 64m2 area. Calculate the area of the original rectangle?
A rectangle with a length and a half in width. If each dimension is added 2m new rectangle with additional 64m2 area. Calculate the area of the original rectangle?
A rectangle with a length and a half in width. If each dimension is added 2m new rectangle with additional 64m2 area. Calculate the area of the original rectangle?
