Senior two math 1 to 20 spaces. Colour them regularly. 3 and 6 and 9 are brown, and 5 and 10 are blue. How do you fill in the other blanks?

Color multiples of 3 brown, 5 blue, 15 half brown and half blue.

For example:

Arrange according to differences

1+2=3; 3+7= 10; 10- 1=9; 9-3=6; 6- 1=5;

+2; +7; - 1; -3; - 1; According to this calculation, the last two digits should be+7; +2,

So the heaviest result in parentheses should be 5+7 =12; 12+2= 14。

Namely13109651214.

trait

Note: The following characteristics are expressed in decimal terms based on integers.

A multiple of 2

At the end of a number is an even number (0, 2, 4, 6, 8), which is a multiple of 2.

Like 3776. The end of 3776 is 6, which is a multiple of 2. 3776÷2= 1888?

Multiple of 3

The sum of the digits of a number is a multiple of 3, and this number is a multiple of 3.

4926。 (4+9+2+6)÷3=7, which is a multiple of 3. 4926÷3= 1642