1. A 6 digit number begins with the digit 8. The number is divisible by 9 and all digit of the number are different . What is the possible smallest value of this number ?
2. MNPQ is the square that is made up of to identical rectangles and two square of area 9cm2 and 16cm2. The area of the square MNPQ is ?
3. I have two digit in the decimal part.Iam greater than 75 but less than 80 . What least possible number am I ?

the sum of two numbers is equal to 77 if the first number is mutiplied by 8 and the second number by 6, the two product is equal. the larger number of these numbers is ...

The sum of two numbers is equal to 77. If the first number is multiplied by 8 and the second by 6, the two products are equal. The larger of two number is...

The average of three numbers is 32. The second number is two times the first number and the third number is six units more than the second number. The first number is ?

The sun of the digits of a two-digit number is multiplied by 8.The result is 8 more than the number.Find the two-digit number

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If we put the digit 1 at the beginning of a 5-digit number, we get a number that is one third as number gotten if we put the digit 1 at the end of this number us. Find this number.

Answer:This number is ....

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: 

the sum of two decimal number is 20,1. If the first number is increased by 5 times and the second number is unchange then new sum will equal 70,5.The second number is....