Explanation

Here are odd numbers

101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 129

one digit is missing in the first two series 101 and 105

then 

two digits are missing in the next two series 105 and 111

then

three digits are missing in the next two series 111 and 119

then 

obviously, next digit in the series comes after 4 digits ( 119, 121, 123, 125, 127, 129)

Explanation

The logic is: 4 × 1 = 4

4 × 2 = 8

8 × 3 = 24

24 × 4 = 96

96 × 5 = 480 

Explanation

2 x 2 = 4

3 x 3 = 9

2 x 3 =49

**

3 x 3 = 9

2 x 2 = 4

3 x 2 = 94

**

4 x 4 = 16

3 x 3 = 9

4 x 3 = 169

ND23-9-2023

Explanation

6 + 6 = 12

12 + 6 = 18

18 + 6 = 24

So every number is increased by 6 to get the next number.

The next number is 24 + 6 = 30

ND23-9-2023

Explanation

Explanation

 16+12 = 28

Sequence is now: 16,12,28

Take the next two terms of the arithmetic sequence S, 8 and 4

8 + 4 = 12

A sequence is now: 16,12,28,8,4, 12

ND18-9-2023

Explanation

17+17+1=35

35+35+2=72

72+72+3=147

147+147+4=298

ND18-9-2023

Explanation

A + 2 = C 

C + 3  = F

F + 4 = J 

J + 5 = O

ND18-9-2023

Explanation

20+5=25

25-2=23.

23+5=28.

28-2= 26

26 + 5 = 31 

31 - 2 = 29  

29 + 5 = 34 

34 - 2 = 32

ND18-9-2023

Explanation

4 x 3 = 12

12 x 3 = 36 

36 x 3 = 108

108 x 3 = 324

ND18-9-2023