Level 2 5 trees are being planted at equal intervals on a road side of 20 m. If the trees are planted at both ends of the road, what is the distance between each tree?
Level 3
A ball is dropped from a height of 120 cm. Every time it hits the ground, it will rebound to half of its original height. What is the total distance the ball has travelled by the time it hits the ground for the 4th time?
Level 2
Jenny wanted to invite 463 guests to her wedding. Each of her 7 friends helped her to make 23 invitation cards. She made the rest of the cards herself.
How many cards did Jenny's friends help her make?
Assuming that Jenny needed a card for each guest, how many more cards did Jenny have to make by herself?
Level 2
There are 45 rows of 13 seats in Victory Concert Hall. 117 people attended a concert at Victory Concert Hall. How many seats were not occupied during the concert?
Level 3
A shopkeeper had 450 cartons of bottled mineral water. In each carton, there were 36 bottles of mineral water. He sold 35 cartons of mineral water, how many bottles of mineral water had the shopkeeper left?