What two numbers add to 18

1 Expert Answer The answer is 10 and 8. First we can think of all the numbers that can add to 18. 1 and 17, 2 and 16, etc.

How many ways can you add up to 18?

So there are exactly 18 sets of four single-digit integers 0–9 that sum to 18. So there are exactly 43 ways that a set of four single-digit integers 0–9 can sum to 18 if we allow duplication.

What 2 numbers multiply to get 18 and add to get 7?

1*18, 2*9, 3*6 that would give the required answer of 18 on multiplication and the addition answer of 7.

What two prime numbers add 18?

• 2 + 5 + 11 = 18.
• 2 + 3 + 13 = 18.

What are 2 numbers that add to 18 and subtract to 2?

Hence, the two numbers are 8 and 10 .

What 2 numbers have a sum of 18 and a difference of 4?

If that is the right question the two numbers are 7 and 11.

What are the factors of 18?

• Factors of 18: 1, 2, 3, 6, 9 and 18.
• Negative Factors of 18: -1, -2, -3, -6, -9 and -18.
• Prime Factors of 18: 2, 3.
• Prime Factorization of 18: 2 × 3 × 3 = 2 × 32
• Sum of Factors of 18: 39.

How many three digit multiples of 18 have the sum of digits equal 18?

25 three-digit multiples of 18 have the sum of the digits which also equal 18.

What two numbers have a sum of 18 and a difference of 6?

The two numbers are 12 and 6.

What are the multiples of 18?

Next, we list the first several multiples of eighteen: 18, 36, 54, 72, 90, 108, 126, 144 . . . By comparing the multiples of eight and eighteen, we can see that the smallest one that they share is 72.

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Is 18 a prime or a composite number?

Is 18 a Composite Number? Yes, since 18 has more than two factors i.e. 1, 2, 3, 6, 9, 18. In other words, 18 is a composite number because 18 has more than 2 factors.

What numbers multiplied equal 7?

MultiplicationMultiples of 77 × 20140

What can you multiply to get 19?

The number 19 has only two factors, the number itself and 1. Hence, the factors of 19 are 1 and 19.

What can you multiply to get 21?

The factors of 21 are 1, 3, 7 and 21. Factor pairs of the number 21 are the numbers that result in the original number multiplying them together.

What two numbers add to 17 and subtract to 3?

10 and 7 have a sum of 17 and a difference of 3.

What are two numbers that add to 16 and subtract to 4?

As the sum is 16 the mid number is 8. For the difference to be 4 while maintaining the sum of 16, numbers shall move both ways by 2. Therefore they are 6 and 10.

What is the LCM of 18?

1.LCM of 18 and 243.Solved Examples4.FAQs

What are first five multiples of 18?

• First five multiples of 18: 18, 36, 54, 72, 90.
• Prime Factorization of 18: 18 = 2 × 32

What are the factors of 18 and 3?

The factors of 3 and 18 are 1, 3 and 1, 2, 3, 6, 9, 18 respectively.

What is the sum of 18 and difference of two?

The numbers are 10 and 8. Their sum = 18 and the difference between them = 2. Add (1) and (2): 2a = 20 or a = 10, and so b = 18–10 = 8.

How do you find the sum and difference of two numbers?

Let a and b be the two original numbers. The sum is a+b. The difference is a-b. Adding the sum to the difference is (a+b) + (a-b) which is a + b + a – b = 2a.

What two numbers add to 19 and subtract to 5?

So the two numbers are 12 and 7 .

What two numbers add to 19 and subtract to 7?

Therefore, the two numbers are 13 and 9.

What is the sum of 19 and the difference of 5?

So, the numbers are 40 and 10.

What two numbers add to 21 and have a difference of 5?

Summary: If the sum of two numbers is 21 and their difference is 5 then the numbers are 13, 8.

Which of the following is the largest two digit multiple of 18?

Hence, the largest two-digit multiple of 18 is 90.

What is the largest 3-digit number that is a multiple of 18?

How about the largest? Well the answer to those questions is 6 and 55, respectively. Hence, there are 50 3-digit numbers that are multiples of 18. The biggest three digit number is 999 and smallest is 100.

How many different ways can the number 45 be written as the sum of consecutive natural numbers?

There are five ways wherein 45 can be written as the sum of consecutive natural numbers.

What are numbers that equal 18?

1 * 18 = 18. 2 * 9 = 18 and. 2 * 6 = 18.

What pair of numbers has an LCM of 18?

When we overlap these two restrictions, we see that the only values common to both sets are 6 and 18. So our possible pairs are (6,6) , (6,18) , or (18,18) . But wait—only one of these pairs has both an LCM of 18 and a GCF of 6. That pair is (6,18) .

What are the factors and multiples of 18?

FactorsMultiples1, 2, 3, 6, 9, 18181621, 19191711, 2, 4, 5, 10, 20201801, 3, 7, 2121189