Question

Hi everyone
The answer is 16
Plz explain how

Answer 1

Let the pair of shoes = x.
Let the pair of whistles = a
Let the boy be " y "
x + x + x = 30
3x = 30
x = 10

x + y + y = 20
10 + 2y = 20
2y = 10
y = 5 .

y+a+a = 13
5 +2a = 13
2a = 8
a = 4 .

A pair of whistles = 4.
One whistle = 2 .

Boy with whistle = 5
But whistle = 2
So boy without whistle = 3

Now, Pair of shoes + Boy without whistle * Whistle

= 10 + 3 * 2

= 10 + 6

= 16 .

Hope helped!

Answer 2

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2 shoes =10

1shoe=5

1man=3

2whistle=4

1whistle=2

10+10+10=30

10+3+2+3+2=20

3+2+4+4=13

10+3×2=16