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Q: How do you make 31 using only the number 4?

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31 is prime so you can only multiply 1 and 31 to get 31. Using non-whole numbers you can get an infinite number of different options. For instance, 15.5 times 2 will make 31. Another example: 8 times 3.875 will also make 31.

2^(4+1)-3

Very simple answer. ((4³) ÷ 2) - 1 = 31. Let's check out equation to verify its solution is the desired number. ((4³) ÷ 2) - 1 = 31 (64 ÷ 2) - 1 = 31 32 - 1 = 31 31 = 31.

The answer is 31C5 = 31!/[26!5!] = 169,911

31 times 1 = 31 As 31 is a prime number, the only whole numbers that do it are 1 Ã— 31. There is another method using fractions. Ex: 15.5 x 2=31Only 1 times 31 = 31 . This is because 31 is a Prime number.

Yes, 31 can only divided by 1 and 31. So it is a prime number

You can make every number up to 15 using only 8, 4, 2, and 1 .If you want to expand your horizons all the way to 18, you'll need the next onein the same series. That's 16. Once you have that, you'll be able to make everynumber up to 31 .

2^3 Times 4 minus 1

to get 31 using the number 4 exactly 4 times, you can do: (4! + 4)/4 + 4!4! is four factorial, which is 4x3x2x1, which is 24. So you have 24 + 4 = 28, /4 = 7, + 24 = 31.

to get the number 25 using 1234 = 31 - 2 - 4

1 and 31 are the only natural number that go into 31

The only positive integer factors of 31 are 1 and itself, therefore, it is prime.A prime number is defined as a number with only factors of 1 and itself. With this definition, 31 is a prime number because the only factors of 31 are 1 and 31.31 is a Prime Number.31 is a prime number because it has only two factors which are itself and one.

1*31 It is a prime number

31 is a prime number, so the only factors it has is 1 and 31.

31 is a prime number so its only factors are 1 and 31.

31 is a prime number. Its only prime factor is 31.

31 is a prime number so it can only be divided by 1 and 31.

Only 1 & 31... 31 is a prime number !

31 is a prime number because it's only factor is 1.

9*9/3 + 6 - 2 = 9*3 + 6 - 2 = 27 + 6 - 2 = 31

31 is a prime number. Its only prime factor is 31.

None. 31 is a prime number. Its only factors are 1 and itself.

The only number that goes into 18 and 31 is 1.

31 is the only one that has only two factors: 1 and itself. It is the prime number.

no because 31 is not an even number. Therefore an even number can not be a factor of it. 31 is a prime number so the only factors it has are 1 and 31