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.
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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.
31 times 1 = 31 As 31 is a prime number, the only whole numbers that do it are 1 × 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.
Only 1 & 31... 31 is a prime number !
1 and 31 are the only natural number that go into 31
using a calculator, type in 25 / (divided by) 31