## How do you multiply two numbers quickly?

“To multiply two 2-digit numbers without showing work, first multiply the ones digits together, then ‘cross-multiply,’ and finally multiply the tens digits together. Make sure to carry whenever a product exceeds 9. As you will see in the examples below, you must work your way from right to left to perform this trick.

## How do you do 3 digit multiplication?

If the bottom factor (multiplier) is a threedigit number, the result of the multiplication of the hundreds place will be followed by two 0s. Let’s look at another example. If we multiply 367 x 251, the first thing to do is to multiply the digit in the ones place of 251, which is 1, by 367.

## How many two-digit numbers are there?

How many twodigit numbers are there? There are 90 twodigit numbers in all.

## How many 2 digit numbers have the digit 3 exactly once?

18 two digit numbers contain the digit 3. The numbers are: 13, 23, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 43, 53, 63, 73, 83 and 93.

## What is the most common 2 digit number?

The most random two-digit number is 37, When groups of people are polled to pick a “random number between 1 and 100”, the most commonly chosen number is 37.

## How many 2 digit numbers have the digit 7 at least once?

Answer: There are 18 two digit numbers containing 7.

## How many odd 2 digit numbers are there?

Answer : thus there are 45 two-digit odd numbers.

## How many 3 digit combinations are there?

There are, you see, 3 x 2 x 1 = 6 possible ways of arranging the three digits. Therefore in that set of 720 possibilities, each unique combination of three digits is represented 6 times. So we just divide by 6. 720 / 6 = 120.

## How many 2 digit multiples of 4 are there?

So there are 22 two digit terms in the series which is multiple of 4.

## What are the multiples of 3 from 1 to 100?

multiple of 3: 3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99. multiple of 4: 4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96. therefore, first three common multiples between 3 and 4 12,24,36.

## What number is a multiple of 12?

The multiples of 12 are 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144,…

## What are multiples of 13?

The two-digit multiples of 13 are 13, 26, 39, 52, 65, 78, 91.