it can be done 19 times
ten (10) times
How many 3 diget number can made by the the following numbers 6789
number of prime numbers which are in the seven times tables: 1 prime numbers are in the seven times tables: 7 only
There are many possible answers. 1 times 42 is a convenient pair of numbers.
The number of combinations of six numbers that can be made from seven numbers will depend on if you can repeat numbers. In all there are over 2,000 different numbers that can be made.
180
Twice. a*a is a squared.
That depends entirely on the number of digits each number is permitted to have !
42 hoe
The number of permutations of three numbers if any number can be repeated is 27 times (Formula is n3, i.e. 33, which is 3 x 3 x 3)333336339363366369393396399633636639663666669693696699933936939963966969993996999
With the numbers: 0,1,2,3,4,5,6,7,8,9 there are 10000 four letter combination's - ten options for the first number times ten options for the second number times ten options for the third number and so on. :)
120