30 can only be used with the following numbers: 1 3 5 7 9 11 13 can be reused

There are several solutions, as follows:

1. Analysis: Use decimal points to solve, the same is true. e68a84e8a2ad62616964757a686964616f31333431333938

Analysis: 3! is a factorial of 3, 3! =3*2*1=。

3、c(5,3)+c(5,3)+c(5,3)=30

Analysis: Using permutations and combinations, c(5,3)=(5*4*3) (3*2)=10, c(5,3)+c(5,3)+c(5,3)=30.

Day + 1 hour + 5 hours = 30 hours.

Analysis: Using the unit solution, 1 day is 24 hours, 24 hours + 1 hour + 5 hours = 30 hours.

Analysis: Convert to a decimal number, because 13 (7) = 10, then 13 (7) + 13 (7) + 13 (7) = 30.

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This problem is unsolvable in decimal: odd odd even, even odd, odd, odd, odd, cannot be equal to 30. Under the nine-base system, 7+9+11 belongs to 30 (under the nine-base system, the 9-base position is 10, 11 9 + 2, 9 is also carried to 10, and the remaining 2 plus the previous 7 is equal to 9 and the same carry is 10, so one is equal to 30,) Of course, there are more answers under the nine-base system, 7+9+11 30, 5+9+13 30, 3+9+15 30

There is no solution to this question.

The numbers given are all odd, the sum of three odd numbers is odd, and 30 is even.

3 cubic 11 to the power of 0 of 1 = 39

15 cubic 1 to the power of 0 of 1 = 3377

1 1 15 to the power of 0 = 3

No, according to parity, the sum of three odd numbers must be odd.

There can be no answer to this question because any 3 odd numbers are added together. It can't be an even number.

Under no circumstances will it be equal to 30---except for miscalculations Each number is an odd number, the sum of the two bases is equal to an even number, and the sum of three counts is equal to an odd number plus an even number, and it is also equal to an odd number; And 30 is an even number. Therefore, the sum of the three counts cannot be equal to 30.

The above question is a false proposition. But is it? Under Eleven:

1+15+15=303+13+15=305+13+13=305+11+15=307+11+13=309+11+11=30 in decimal system: 3+15+15=305+13+15=307+13+13=307+11+15=309+11+13=30 in decaptal: 5+15+15=307+13+15=309+13+13=30 under heptanadecimal:

7 + 15 + 15 = 309 + 13 + 15 = 30 in hexadecimal: 9 + 15 + 15 = 30

How can 3 odd numbers be added together?

Option 1: 3! +11+13=30 （3!=6) Scheme 2: log3 (9)+3 +1=30 (log3 (9)=2,)

Scheme 3: Scheme 4: 1'+15+15=30 (the derivative of any constant is 0) Scheme 5: 3 +3+1'=30 (3 =27 1'=0) Scheme 6:

3³+9-3！=30 (use negative numbers) Option 7: 11+13+(6)=30 (inverting 9 to 6 is suspected of being opportunistic).

Scheme 8: 1 (day) + 1 (hour) + 5 (hour) = 30 (hour) (Swap unit) Scheme 9: 15 + 15 + 1 = 30 (30 in decimal is 33 in decimal, and 15 is 16 in decimal).

Hello, in the decimal system, it is impossible to add three odd numbers to get an even number proof: odd + odd = even even even + odd = odd order + get: odd + odd + even + odd = odd + even simplification:

Odd + Odd + Odd = Odd i.e.: 3 Odd = Odd Non-decimal Algorithm Reference: Under Eladage:

1+15+15=303+13+15=305+13+13=305+11+15=307+11+13=309+11+11=30 in decimal system: 3+15+15=305+13+15=307+13+13=307+11+15=309+11+13=30 in decaptal: 5+15+15=307+13+15=309+13+13=30 under heptanadecimal:

7 + 15 + 15 = 309 + 13 + 15 = 30 in hexadecimal: 9 + 15 + 15 = 30

In the decimal system, the eight numbers 1, 3, 5, 7, 9, 11, 13, and 15 are all odd;

Three odd numbers are added together, and in the end they are still odd;

And 30 is an even number.

Therefore, in the decimal system, it is impossible to get 30 by adding any three numbers of 1, 3, 5, 7, 9, 11, 13, and 15

1 All 1, if it is decimal addition, three odd numbers cannot be added to the sum of even numbers, this problem is not solved.

2. If it is 11 base addition, the answer is 7+11+13=30.

3. If it's a brain teaser, the answer is.

There are a lot of things that can be used, just look for them directly on the Internet, which is very convenient.

There are many answers, such as:

1. If it is decimal addition, it is impossible to add three odd numbers to the sum of even numbers, and there is no solution to this problem.

2. If it is a 11-base plus vibrillation book, the answer is 7+11+13=30.

3. If it's a brain teaser, the answer is.

4. Turn 9 upside down to 6, 6+11+13=30, or 6+9+15=30.

There is no answer to this question, because the sum of 3 odd numbers is still an odd number, and 30 is an even number, so there is no answer.

In decimal, the addition of three odd numbers cannot be even.

If you want to have an answer, this way:

6 is 9 upside down.

The correct answer, you only ask questions, incorrect answers, no fun! Thank you for the recommendation of the management muffler!! Bugs.

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()+=30 (Each number can be reused.)

It's an odd number. The sum of 3 odd numbers is an odd number and cannot be equal to an even number.