Question

can you solve this number logic​

Answer 1

Number Puzzle usually follow a consistent logical pattern.

First Row: 2, 6, 18

Observe that multiple used is 3:

⇒ 2 x 3 = 6

⇒ 6 x 3 = 18

Second Row: 4, 20, 100

Observe that the multiple used is 5:

⇒ 4 x 5 = 20

⇒  20 x 5 = 100

Third Row: ?, 21, 147

So, with the same number logical, observe that the multiple used is 7:

⇒ ? x 7 = 21

⇒  21 x 7 = 147

So now lets look at ? x 7 = 21

? x 7 = 21

? = 21 ÷ 7

? = 3

Answer: 3