A website Maths Puzzle Numerical Ability

what is next series 1,5,12,24,43,?

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A website Other Question

If m^n = 361, 'm' and 'n' being natural numbers, what will be a value of (m-n)/1?



let a=b

Then,

1. ab = a^2

2. ab - b^2 = a^2 - b^2

3. b(a - b) = (a + b)(a - b)

4. b = a + b

5. b = b + b

6. b = 2b

7. 1 = 2

which step is the flaw in the above proof?