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It depends on why the other half are disappearing!

Q: How many rolls are needed to have half the 120 dice remaining?

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Rolls of half dollars are $10.00 so 20 coins are needed

Half the time!

double it and that your answer!(4) like 3,6! and it you cant doulble it ( cus its not on the dice)then half it!

Three out of six which reduces to one half.

The probability of getting an even number on a six sided dice is 3 out of 6 or one half because the only even numbers are 2,4,6 (which are all even).

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Rolls of half dollars are $10.00 so 20 coins are needed

1 dozen rolls = 12 rolls Let x = the number of rolls needed. (12 rolls)(1 person / roll)x = 150 people 12x = 150 x = 12.5 However, if you can only buy dozens in whole numbers (and you can't buy half a dozen, for example), you should round up. So you would need 13 dozen dinner rolls.

A standard bank box of nickels contains $100 worth, which is 50 rolls at $2 each.

Half the time!

double it and that your answer!(4) like 3,6! and it you cant doulble it ( cus its not on the dice)then half it!

After three half-lives, 12.5% of the radioactive isotope is remaining. This is because each half-life reduces the amount of radioactive material by half.

about half a mill.

The median.

Three out of six which reduces to one half.

There are 12 in one dozen. Therefore, 3.5 dozen rolls is equal to 3.5 x 12 = 42 rolls. Unless of course, it's a baker's dozen!

The probability is .5 since half the numbers are even and half are odd.

The best method is to make dice of the same size. First cut the squash in half, then de-core it, then make dice each with the skin on one side of them.