The topic of finding regularity in grade six I need a few more difficult answers to tell me there are ideas

The topic of finding regularity in grade six I need a few more difficult answers to tell me there are ideas

A J R
H Q Y
It's regular
Looking up,
In the first column, there are two letters from a to D and three letters from D to H
In the second column, there are two letters from J to m and three letters from m to Q
So, you should fill in R with two letters and y with three letters
For example, 1, 4, 9, 16
Yes, it's 1234456789 square. You can also find cubic

1. A cube with an edge length of 1 decimeter has a volume of () cubic decimeter; it is also a cube with an edge length of () cm, with a volume of () cubic centimeter
2. In a year, there are 31 days in each month (); 30 days in each month (); and () in February
3. 3:00 p.m. is represented by 24:00 p.m. (), 11:30 p.m. is represented by 24:00 p.m. ()
4. To change 15 tons into kilogram, you need to add () zeros after 15
There are () 45mm in 5.4.5m, 5 times of 9decimeter is () M
6. Divide the 1 meter long line into 100 parts, each part is () cm long
7.25 decimeter is 1 meter, 1.8 ton is kg
8. The shop opens at 5 a.m. and closes at 7 p.m. for () hours a day
9. There are 15 liters of water. If you use a measuring cup with a capacity of 700 ml to measure the water, the energy () cup, and the remaining () ml
10. A rope is 3 meters long, cut 6 decimeters, the remaining rope is () times of the cut rope
11. A round steel, 1.2 meters long, can be sawed into 8 cm long segments, a total of () segments, to saw () times
12. A rectangular piece of paper is 8 cm long and 6 cm wide. Cut it into the largest square. The area of the cut part is ()

2.1 month, March, may, July, August, October, December, April, June, September, November, 28 days, 3.15 hours, 23:30 minutes, 4.35.100 pieces, 4.5 meters, 6.1 cm, 7.4/11800 kg, 8.14 hours, 9.21 cups, 300 ml, 10.4 times, 11.15 segments, 14 times, 12.12 cm, the answer above is wrong!

A primary school sixth grade mathematics fill in the blank, good additional points
How many triangles are there with an integer side length and a maximum side length of 4cm?

1,4,4
2,3,4
2,4,4
3,3,4
3,4,4
A total of 5, with any two sides of the triangle greater than the third side to do