Question

these ques needs brain and keen observation

Answer 1

3 pair of shoes =30
=>1 pair of shoes = 10

10+ 2 heads =20
=>2 heads = 10
=> 1 head = 5
This is man head with button on his shirt

5+ 2 whistles= 13
=> 2 whistles =8
=> 1 whistle with 2 pins =4

now
pair of shoe + a man head without button on his shirt * a whistle with 1 pin

= 10 + 5 * 4

Here First priority is for multiplication as per BODMAS Rule.

= 10 + (2.5*2)
= 10 + 5
= 15

;)
Hope it helps
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Answer 2

10 + 5 * 2 = 20

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