Double means add twice so it would be 1+1=2. 2cups
A quarter cup doubled is half a cup. This is because 1/4 cup + 1/4 cup = 1/2 cup.
3/4 of a cup doubled is 6/4 of a cup, which equals 1 1/2 cups
One fourth cup doubled is one half cup, since 1/4 + 1/4 = 2/4, or 1/2.
To double two-thirds of a cup, you would multiply 2/3 by 2. This can be calculated as (2/3) * 2 = 4/3 or 1 and 1/3 cups. Therefore, two-thirds cup doubled is equivalent to 1 and 1/3 cups.
3 Cups 1/2 cup equals 0.5, so 1.5 x 2 = 3
One doubled once is 1*2. One doubled twice is 1*22. One doubled three time is 1*23=8.... One doubled 64 times is 1*264=264, or approximately 1.84*1019, or 18.4 quintillion.
One half doubled will give you a whole or one.
1/2.
3
3
A natural number is doubled when added to its reciprocal. Find that number!
1 MILLION!