Question

if 1-1=0,2-1=3, 3-1=8, then 5-1=?

Answer 1

1-1=0,2-1=3, 3-1=8
2-1=3
and 3-1=8
we see that -1 increases the numbers by 1 & 5. no difference =4
5-1=5+4=9

Answer 2

Answer:

Answer is 24.

To solve this kind of problems we have to use our logical thinking skill  and cannot use the simple subtraction method

Because 1-1=0 and 2-1=3 which is not possible because we know that 2-1=1 but they have given as  

2-1=3

According to the question we have

1-1=0

2-1=3

3-1=8

We have to find 5-1

Let us consider 1st equation

We have 1-1=0

The other way of writing this without changing the is

$1^{2}-1=0$ it satisfies

$3^{2}-1$ =9-1=8 it satisfies

$5^{2}$ -1=25-1=24

So 5-1=24