If you're seriously not getting this
When he was 4 she was half his age, that means she was (4:2=) 2. So she is only two years younger than him. Therefore, now that he is 100 she is (100-2=) 98 years old.
I dont think you need to be a "genius" to crack it tho. I see many know it already, but explained for others:
If the sister was half his age when he was four, it means she was two, hence she is only two years younger.
100 - 2 = 98.
Most people would say 50 because they just quickly looked at the problem. I did that at first, then I looked over the problem one more time and solved it.
Well, I mean in theory, if his sister was, say, in space traveling faster than the speed of light, special relativity suggests that she could possibly be only 50 by her own accounting.
plz
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Downvote it
That is not true
When I was that age I could
very easily
Not bragging
just saying
Your facts aren't straight
When he was 4 she was half his age, that means she was (4:2=) 2. So she is only two years younger than him. Therefore, now that he is 100 she is (100-2=) 98 years old.
it's 98
do these people know stuff???
If the sister was half his age when he was four, it means she was two, hence she is only two years younger.
100 - 2 = 98.