Write the least common multiples of the following groups: 18 and 27; 14 and 4; 12 and 16; 15 and 20

Write the least common multiples of the following groups: 18 and 27; 14 and 4; 12 and 16; 15 and 20

18 and 27
18=2×3×3
27=3×3×3
The least common multiple of 18 and 27 is = 2 × 3 × 3 × 3 = 54
14 and 4
14=2×7
4=2×2
The least common multiple of 14 and 4 is = 2 × 2 × 7 = 28
12 and 16
12=2×3×2
16=2×2×2×2
The least common multiple of 12 and 16 is = 2 × 3 × 2 × 2 = 48
15 and 20
15=3×5
20=2×2×5
The least common multiple of 15 and 20 is = 2 × 2 × 3 × 5 = 60

What are the rules of the answers to the number question 0.1.3.8.21 (55) 144?
What are the rules of these figures?

One number * 3-previous number = next number 21 * 3-8 = 55

Fill in the blanks according to the rules: 0, 1, 3, 8, 21, (), 144

55
1*3-0=3
3*3-1=8
8*3-3=21
21*3-8=55
55*3-21=144

24 21 56 72 4 6 ,7
3,7 8,9 8

24、21、56、72
4、6、7、3,7 8, 9 , 8
4x6=24
7x3=21
7x8=56
9x8=72

9-24/56*21

9-24/56*21=9-9=0

Find out the rule, and find the appropriate number in the blank: (1) 3,6,4,7,24, (), 32,56 (2) 1,4,6,8,5,20,30, ()

1. There are eight numbers in this question, and the last four numbers are eight times of the first four numbers, so you should fill in 48
2. There are also eight numbers in this question. The last four numbers are five times of the first four numbers, so you should fill in 40

Decomposition quality factor 96 56 420 75
Li Liang's watch is 3 seconds faster in 4 hours. If it is not adjusted, how many seconds faster in a day? (to calculate)

96=2×2×2×2×2×3
56 =2×2×2×7
420 =5×2×2×3×7
75=5×5×3

Decompose the following numbers into prime factors

To decompose prime factor is to decompose a number into a product of prime numbers
The prime number is 2.3.5.7.11.13.17.19.23
Prime numbers are numbers that can only be divisible by 1 and itself (1 is not)
24=3*2*2*2
45=5*3*3
65=5*13
84=2*2*3*7
102=2*3*17
475=5*5*19

How to decompose the prime factor and decompose the 480 into the prime factor

480=2*2*2*2*2*3*5

Decompose the following numbers into quality factors 48 56 150

48=3×4×4
56=2×2×2×7
150=2×3×5×5