Multiply a number by 8, divide it by 2, and subtract 20. The result is 100. Do you know what the number is? fast

Multiply a number by 8, divide it by 2, and subtract 20. The result is 100. Do you know what the number is? fast

thirty

Multiply a number by 8, divide it by 8, and subtract 20 to get 100. Do you know what this number is?

x*8/8=x
x-20=100
x=120

A number plus 3, then multiply by 3, then subtract 3, and then divide by 3, the final result is still 3, this number is ()?
Have a formula!

Yes. It's 1
1+3=4
4*3=12
12-3=9
9/3=3
Isn't it?

In addition, 4 rational numbers 3, - 5,7, - 13 can be made equal to 24 by operation

[(-5)*(-13)+7]/3

How can 1234 be equal to 1

There are many algorithms, such as
1×2+3-4
2*3-4-1
1*2+3-4

1+12+123+1234

1370

1234 2341 3412 4123 what is the simple algorithm for this determinant
one thousand two hundred and thirty-four
two thousand three hundred and forty-one
three thousand four hundred and twelve
four thousand one hundred and twenty-three
What is the simple algorithm for this determinant

│ 1 2 3 4 ││ 2 3 4 1 ││ 3 4 1 2 ││ 4 1 2 3 ││ 10 2 3 4 ││ 10 3 4 1 ││ 10 4 1 2 ││ 10 1 2 3 ││ 10 2 3 4 ││ 0 1 1 -3 ││ 10 4 1 2 ││ 10 1 2 3 ││ 10 2 3 4 ││ 0 1 1 -3 ││ 0 2 -...