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Put1,2,3,4,5,6,7,8,9 in the circles on the edges of the triangle below such thatthe sum of the numbers on one side equals the sum of the numbers on the other side,which is 17.The sum of the numbers on the three vertices is
Question 9:
Put1,2,3,4,5,6,7,8,9 in the circles on the edges of the triangle below such thatthe sum of the numbers on one side equals the sum of the numbers on the other side,which is 17.The sum of the numbers on the three vertices is....
Put1,2,3,4,5,6,7,8,9 in the circles on the edges of the triangle below such thatthe sum of the numbers on one side equals the sum of the numbers on the other side,which is 17.The sum of the numbers on the three vertices is 
jack writes the consecutive natural number from 1 to 10 on a board . if he erasers some of the numbers and adds up the remaining ones then he will get a sum of 30.The number of numbers that is erased on the board at most is ...................................
Consider the set of the first one hundred natural numbers {0,1,2,3,…,99}. Let k be the sum of digits of a number in the set. Find the value of k such that the number of numbers whose digits add up to the same value is a maximum.
The teacher has 12 cards of number 1 to 12 and gives to 6 students
randomly.
Each student receives 2 cards, then tells students in the class the sum of 2
numbers on cards to examine whether or not the sum is a prime number.
Surprisingly, all of the 6 sums are prime numbers.
What is the sum of these 6 prime numbers from the 6 students?
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1) Fill the mussing number. A cube has.....vertices
2) Fill the missing number. We're in the....st century
3) Ther are only two 2-digit numbers that are a multiple of 7 and the sum of thetr two digits is 10. Find the sum of these two 2-digit numbers: 70,119,140,21
4) The fourth power of 3 is...
5) Twice the square of 3....
6) The number of ethnic group in Vietnam?
7) The perimeter of 4cm square egde in cm?
The lengths in cm of three sides of a triangle are three consecutive odd numbers.
Knowing that the perimeter of the triangle is 40.5 dm, find the length of the longest side of the
triangle.
A.137cm
B.135cm
C.143cm
D.145cm
What is the difference between the sum of the first 100 positive even numbers and the sum of the first 100 positive odd numbers ?