Solution:

It is not possible to guess only three fruits correctly: the fourth fruit is then correct too! So nobody has guessed three fruits correctly and 123-43-39-31 = 10 people have guessed four fruits correctly.

Solution:

Move the 6 up just a little bit.
2pow(6) -63 =1

Solution:

Name of a Person

Solution:

Concrete floors are very hard to crack

Solution:

Turn the grid upside down. Circle the numbers 1, 9, 1, 1 When you flip it upside down the 6 becomes 9

Solution:

The surgeon is the boy's mother

Solution:

The wife is a photographer.

She shot a picture of me , developed it, and hung it up to dry.

Solution:

Go.

Solution:

He reported (truly) that the 'Alonso' came in next to last while the 'Hamilton' came in second.

Solution:

A bubble.

A bubble is lighter than air, but no matter how many people try, they cannot lift or hold a bubble in their hands because it will burst upon contact.