Question

Write a numerical expression that has a value equal to each number from 1 through 30. In each expression, use each of four consecutive digits from 0–9 exactly once.

Answer 1

See Explanation

Explanation:

Required

Use any 4 consecutive digit from 0 to 9 to form an expression that equals 1 through 30

There is no formula to answer this question. All we need to do is, apply trial by error method to for each expression.

Possible expression and their results are:

`- 1 + 2 * 3 - 4 = 1`

`1 + 2 + 3 - 4 = 2`

`0 * 3 + 1 + 2 = 3`

`0 * 2 + 1 + 3 = 4`

`1 * 3 + 4 - 2 =5`

`0 + 1 + 2 + 3 = 6`

`0 + 1 + 2 * 3 = 7`

`3 + 4 - 5 + 6 = 8`

`1 * 2 + 3 + 4 =9`

`1 + 2 + 3 + 4 =10`

`2^3 + 4 - 1 = 11`

`5 + 6 - 7 + 8 =12`

`4^2 - 3 * 1 = 13`

`2 + 3 + 4 +5=14`

`2 * 3 +4 + 5 = 15`

`4 * (3 - 1)^2 = 16`

`3 * 5 + 4/2 = 17`

`3 + 4 + 5 + 6 = 18`

`2 + 3 * 4 + 5 = 19`

`3 + 2^4 + 1 = 20`

`4 * 5 - 6 + 7 = 21`

`4 + 5 + 6 + 7 =22`

`3 * 4 + 5 + 6 = 23`

`5^2 -4 + 3 = 24`

`2^5 - 4 - 3 = 25`

`5 + 6 + 7 +8 = 26`

`(3^4)/(5-2) =27`

`5 * 4 + 2^3 = 28`

`3 + 4 * 5 + 6 = 29`

`6 + 7 + 8 +9 = 30`