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 3 digit numbers can you make using the digits 1/2 and 3 without repetition?
This is because you have space for three digits that can be chosen from the set [1,2,3]. So you can make 27 three digit different numbers .
How many 3 digit numbers can be written from the digits 1 2 3 and 4 if repetition of digits is allowed?
So the number of 3-number combinations are- (1,2,3),(1,2,4),(1,3,4),(2,3,4). Each can be arranged in 6 ways, so we get 24 ways totally. So why is my answer different here?
How many numbers can be formed by using all the digits 1 2 3 4?
Total Number of Numbers which can be formed by numbers 1,2,3,4,5 (without repeating digitsi) = 5*4*3*2*! = 5! = 120. Now, in half them unit’s digit will be bigger than the ten’s digit and in half of them it will be smaller.
How is 1 / 3 and 3 the same number?
So “1/3 of 1/3” means “1/3 x 1/3”. When multiplying fractions, you multiply the numerators (the number on top) to form the numerator of the answer. You also multiply the denominators (the bottom) to produce the denominator of the answer.
How to make a number into a trick?
Answer: 8 1 Think of any number. 2 Multiply the number you have thought with 3. 3 Add 45 with the result. 4 Double the result. 5 Divide the answer by 6. 6 Take away the number you have thought from the answer, that is, subtract the answer from the number you have thought.
How many combinations can you make with the numbers 1, 2, 3?
Starting with 1 2 3 we can form combinations of size 1 2 or 3. n! r!(n − r)! That is a total of 7 combinations. (If we wish to count choosing 0 items — the empty combination — as a combination, then we must add 1 way of doing that.)
How to multiply a 3 digit number with a 2 digit number?
Think of a 3 digit number. Multiply it with x7x11x13. Think of a 2 digit number. Multiply it with x3x7x13x37. Think of a 5 digit number. Multiply it with 11. Multiply it with 9091. Here we have mentioned few math trick play. You can play these tricks as instructed, with your parents or friends and prove your talent to them.
