Tricky maths question
Posted: Fri Sep 09, 2011 12:22 am
Can someone help me with these questions please:
1) Halim grows a sunflower which he measures each week. After eight weeks it is 1.32m tall and in the next week it growa a further 19am.
How many more centimetres must it grow to be 2m tall (1 mark) Answer is 49cms or (0.49m)
2) A 4x4x4 cube is made of 1cm cubes. The outside of the large cube is painted red.
How many of the 1cm cubes will have exactly 2 sides painted red, Answer is 24
3) John is three times older than his sister Mary. In three years time he will be twice as old as Mary. How old is John now? Answer is 9 years. I know it looks simple but my brain is not functioning at the moment.
Many Thanks.
1) Halim grows a sunflower which he measures each week. After eight weeks it is 1.32m tall and in the next week it growa a further 19am.
How many more centimetres must it grow to be 2m tall (1 mark) Answer is 49cms or (0.49m)
2) A 4x4x4 cube is made of 1cm cubes. The outside of the large cube is painted red.
How many of the 1cm cubes will have exactly 2 sides painted red, Answer is 24
3) John is three times older than his sister Mary. In three years time he will be twice as old as Mary. How old is John now? Answer is 9 years. I know it looks simple but my brain is not functioning at the moment.
Many Thanks.