Kang Kang participated in tree planting activity since 8 year old. One tree was planted in the first year, and every year Kang Kang plants one more tree than the previous year. Now he is 18 years old. How many trees has Kang Kang planted in the past 11 years?
If yesterday was Monday, Xiao Ming made a date with friend today to go to the library five days later. What day will Xiao Ming and his friends go to the library? Please state your answer in the letters shown: Monday = MON, Tuesday = TUE, Wednesday = WED, Thursday = THU, Friday = FRI, Saturday = SAT, Sunday = SUN.
The table below shows the number of different balls in the sports room, 36 basketballs, 42 ping pong and 70 badmintons. How many footballs are there in the sports room?
| Ball | Amount in the source pictogram |
|---|---|
| Basketball | 4 full symbols + 1/2 symbol (36) |
| Pingpong | 5 full symbols + 1/4 symbol (42) |
| Badminton | 8 full symbols + 3/4 symbol (70) |
| Football | 9 full symbols + 1/4 symbol |
Xiaohu’s phone number is seven digits, the first three digits are the same, and the sum is 18. Among the remaining four digits, the next digit is twice as large as the previous digit. What is the sum of the seven digits?
Kai Wei likes to count the sum of hours and minutes on an electronic clock. If the electronic clock now shows 13:25, then Kai Wei will get 38. This is a 24-hour electronic clock, so what is the maximum number of numbers on the clock?
The height of a high wall is 63 meters. An ant is trying to climb up. The ant climbs 10 meters and slides down 3 meters every day. How many days does it take for the ants to climb to the top of the wall?
There are 15 flags hanging on the runway of the school field. Xiao Ming ran from the first flag to the 15th and ran a total of 210 meters. What is the distance between the two flags?
The shop bought 5 new boxes of biscuits and sold 10 biscuits every day for 4 consecutive days. After rearranging it, aunty found that the remaining biscuits filled exactly 3 boxes, so how many biscuits are in a box?