When a girl was 7, her sister was 14, now the girl is 10. How old is her sister now?

Answer: 17

Solution:

Correct Answer: 17

Condition 1: 

Girl age = 7

Sister age = 14

So here age difference is 7 years

Condition 2:

Girl age =10

so Sister age = Girl age + 7=10+7=17

Hence Sister age is 17

What instrument can be heard but not seen?

Answer: Your voice.

Solution:

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Your voice.

Why did the pilot sit on her alarm clock?

Answer: She wanted to be on time.

Solution:

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She wanted to be on time.

I am known for my natural tuxedo and marching. What am I ?

Answer: Penguin

Solution:

What jumps when it walks and sits when it stands?

Answer: kangaroo

Solution:

What do cows give after an earthquake?

Answer: Milk shakes.

Solution:

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Milk shakes.