Intervals
In a building, there are 8 steps in the staircase leading from one floor to another. How many steps are there from the second to the sixth floor in that building?
32 steps
74 + 75 + 77 + 80 + 82 + 85
473
45 x 11
495
⬢ + ⚫ = 54
⬢ = ⚫ + ⚫ + ⚫ + ⚫ + ⚫
What does each shape equal?
⚫ = 9
⬢ = 45
45 ÷ 9 x 5 - 3
22
A tree is planted at every 10 metres along a stretch of road. If the stretch of road is 150 m long and the trees are planted at opposite ends of the road, how many trees are there?
16 trees
299999 + 29999 + 2999 + 299 + 29
333325
2 x 5 x 4 x 25
1000
✰ + ▲ = 8
▲ + ▲ = 10
✰ + ▲ + ◯ = 12
What do the ✰, ▲, and ◯ each equal to?
✰ = 3
▲ = 5
◯ = 4
There were a total of 30 cars and motorcycles at a car park. There were 100 wheels in all. How many cars were there at the car park?
20 cars
There are 50 lamp posts along a stretch of road with lamp posts placed at opposite ends of the road. If each lamp post is 2 m away from another, how long is the road?
98 m long
719 - (513 - 229)
435
26 x 5 x 8 x 125
130000
◯ + ◯ + △ + △ + △ = 36
◯ + ◯ + ◯ + △ + △ + △ + △ = 50
Find what each shape equals.
◯ = 6
△ = 8
53 + (36 - 21) + 210
278
Every side of a square handkerchief is embroidered with 6 flowers. A flower is embroidered on each of the four corners. How many flowers are there on the handkerchief altogether?
20 flowers
947 + (372 - 163) - 572
584
What is the prime factorization of 180?
2 x 2 x 5 x 3 x 3
There are five people, A, B, C, D and E.
A is older than B.
C is younger than E but older than D.
D is older than B.
E is younger than A.
Rank the five people, starting with the youngest.
B, D, C, E, A
A farmer has 30 chickens and rabbits altogether. There are only 100 legs. Find the number of chickens and the number of rabbits that the farmer has.
10 chickens and 20 rabbits.
41 plum trees are planted along a stretch of road with trees planted at opposite ends Of the road. The distance between each tree is 4 m. On the opposite side of the road pine trees are planted at regular intervals of 5 m, with trees planted at opposite ends' of the road. How many pine trees are there on this side of the road?
33 pine trees
360 - 357 + 354 - 351 + ... + 300 - 297
33
45 ÷ 13 + 345 ÷ 13
30
Five teams take part in a zonal basketball league. Each team has to play exactly one match against another team. So far, Team A has played 4 matches and Team B has played 3 matches. If Team D and Team E have each played 2 matches, how many matches has Team C played?
1 match
Car A left Town A for Town B. Car B left Town B for Town A at the same time. The two cars met 4 h later. Find the distance between Town A and Town B, if their travelling speeds were 65 km/h and 80 km/h respectively.
Together, they travelled 65 + 80 = 145 km in one hour; 145 x 4 = 580 km
The two towns were 580 km apart.