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A 6 digit number begins with the digit 8.The number with divisible by 9 and all digits of the number are different.What is the possible smallest value of this number?
Câu 9:
The average mass of a group of children is 47kg. If of the number of children are girls and their average mass is 39kg. Find the average mass of the boys.
Answer: The average mass of the boys is kg
Câu 10:
A 6-digit number begins with the digit 8. The number is divisible by 9 and all digits of the number are different. What is the possible smallest value of this number?
Answer:
Find a natural number so that the divisor is divisible by 9, then the number is 7 and the balance is the largest.
That number is ...
John wrote a 3-digits number on a piece of a paper and asked Peter to guess it. Peter asked:Is the number 173 ?.John replied:One of the digits is correct, the position of that difiy is also correct. Peter asked again:Is the number 123 ?. Two digits are correct, but the position of those digits are wrong. Peter asked again:Is the number 324 ?. All three are correct , but the digits are all in the wrong places. What is the number written by John ?Help me. Ai đúng tớ tick với KB nhé
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John wrote a 3-digits number on a piece of a paper and asked Peter to guess it. Peter asked:"Is the number 173 ?".John replied:"One of the digits is correct, the position of that difiy is also correct". Peter asked again:"Is the number 123 ?". Two digits are correct, but the position of those digits are wrong." Peter asked again:"Is the number 324 ?". All three are correct , but the digits are all in the wrong places." What is the number written by John ?
Help me. Ai đúng tớ tick với KB nhé
Problem 1. Find two distinct numbers, given that their sum is three times their difference, and their product is eight times their difference.Problem 2. The following sequence of numbers was written on a board: 1, 2, 3, 4, ..., 200. Uyen erased three consecutive numbers and the sum of the remaining numbers is 19848. Find the three numbers that were erased.Problem 3. The price of a type of chalk in August dropped by 10% compared to that in June, but increased by 10% in October compared to that in...
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Problem 1. Find two distinct numbers, given that their sum is three times their difference, and their product is eight times their difference.
Problem 2. The following sequence of numbers was written on a board: 1, 2, 3, 4, ..., 200. Uyen erased three consecutive numbers and the sum of the remaining numbers is 19848. Find the three numbers that were erased.
Problem 3. The price of a type of chalk in August dropped by 10% compared to that in June, but increased by 10% in October compared to that in August. How many percent has the price increased or decreased from June to October ?
Problem 4.Find the smallest whole number such that when it is multiplied by 12345679, the resulting product is a number having all of its digits equal to 8.
Problem5. Find the digits a and b such that the number 2016ab is divisible by 2 and 9, and has a remainder of 3 when divided by 5.
Use all the digits below to form the decimal number that is smaller than 5.
2; 5; 9; 4; 8
How many such numbers are there?
Use all the digits below to form the decimal number that is smaller than 1
9; 0; 3; 7; 1.
How many such numbers are there?
Use all the digits below to form the decimal number that is smaller than 5.
2; 5; 9; 4; 8
How many such numbers are there?
given the digits from 0 to 5 if repetition is not allowed, how many four-digit codes that are greater than 2000 and divisible by 2 are possible? Answer:...