Simple friday maths quiz
Discussion
Since there is another thread bemoaning the quality of maths, here's a simple little maths challenge (or it should be for the P&P).
Using only the basic math operators (+ / - *) make 24 from 8,8,3,3.
You have to use all 4 numbers.
ETA: You can only use each number once.
Using only the basic math operators (+ / - *) make 24 from 8,8,3,3.
You have to use all 4 numbers.
ETA: You can only use each number once.
Edited by him_over_there on Friday 14th August 09:57
Another neat little puzzle.
There's a hall with 1000 switches on a wall. There's a 1000 people.
The first person switches all the switches on.
The second person goes to every second switch and switches it off.
The third person goes to every third switch, if it's on, he turns it off. If it's off, he turns it on.
The fourth person does this to every fourth switch
So on, so on.
After the 1000th person is finished. What switches are on.
There's a hall with 1000 switches on a wall. There's a 1000 people.
The first person switches all the switches on.
The second person goes to every second switch and switches it off.
The third person goes to every third switch, if it's on, he turns it off. If it's off, he turns it on.
The fourth person does this to every fourth switch
So on, so on.
After the 1000th person is finished. What switches are on.
him_over_there said:
Another neat little puzzle.
There's a hall with 1000 switches on a wall. There's a 1000 people.
The first person switches all the switches on.
The second person goes to every second switch and switches it off.
The third person goes to every third switch, if it's on, he turns it off. If it's off, he turns it on.
The fourth person does this to every fourth switch
So on, so on.
After the 1000th person is finished. What switches are on.
The 1st?There's a hall with 1000 switches on a wall. There's a 1000 people.
The first person switches all the switches on.
The second person goes to every second switch and switches it off.
The third person goes to every third switch, if it's on, he turns it off. If it's off, he turns it on.
The fourth person does this to every fourth switch
So on, so on.
After the 1000th person is finished. What switches are on.
much appreciated
Gassing Station | The Lounge | Top of Page | What's New | My Stuff