Maths card problem

I am a three-digit number. The sum of my hundreds and tens digits is 11. The sum of my tens and my ones digits is 4. The sum of all my digits is 12.

What number am I?

8 + 3 = 11

3 + 1 = 4

8 + 3 + 1 = 12

Number = 831

Maths Problem

Owen played on his iPod for 57 minutes instead of doing his homework. He played Angry Birds for 15 minutes, watched videos for 12 and Fruit Ninja for the rest of the time. How long did he play for?

57 mins - Angry Birds 15 mins = 42

42 mins - Videos 12 mins = 30 mins

30 Minutes of fruit ninja

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