Question

Find the number that goes in the box marked A.

Input
1
2
5
A
?
Output
2
4
- 10
16

Answer 1

The number that goes into the box marked A is 8

From the input and output values given ;

1 = 2

2 = 4

5 = 10

A = 16

We can see that each input is multiplied by 2 to produce the corresponding output value.

This means that for an output value of 16 .

Input, A = 16/2

A = 8

Therefore, A = 8