Naomi has six number cards: [2], [3], [4], [5], [6], [7]. She makes two 3-digit numbers using each card once and adds them together. What is the largest total she can make?

Using the same six number cards ([2], [3], [4], [5], [6], [7]), what is the smallest total Naomi can make by adding two 3-digit numbers?

Which general statement correctly describes the sum of any two odd numbers?

Which general statement correctly describes the sum of three odd numbers?

Which general rule completes the mathematical statement: odd + even = ?

Mary states: "The difference between two odd numbers is odd." How should Mary's statement be classified?

What type of number is always produced when subtracting an even number from another even number (even - even)?

Which general rule describes the calculation outcome of: odd + odd + even?

Leroy says: "I added two odd numbers and one even number and my answer was 33." Why is Leroy incorrect?

Paula claims: "I added three odd numbers and my answer was 50." Which general rule proves Paula wrong?

Martha says: "I added three even numbers and my answer was 25." Which mathematical rule disproves her calculation?

In mathematics, what is the exact definition and purpose of a counter-example?

Hassan claims: "Adding two odd numbers always gives an odd number answer." Which calculation provides a valid counter-example to show Hassan is wrong?

Salem says: "When you add 5 to any number, the answer will always be odd." Which calculation serves as a counter-example?

Alma says: "When you add 4 to any number, the answer is always an even number." Which calculation disproves Alma's statement?

Pierre had 469 stamps at the beginning of the year. During the year he collected 137 more stamps. How many stamps does he have at the end of the year?

Bashir is thinking of a number. He says: "If I subtract 16 from my number, the answer is 95." What number is Bashir thinking of?

Bashir thinks of another number. He says: "If I add 26 to my number, the answer is 95." What number is Bashir thinking of?

Aiko states that adding two 2-digit whole numbers can never result in a 4-digit number. What is the maximum possible sum of two 2-digit numbers?

What is the missing number in the calculation: 100 - ? = 58

What is the missing number in the calculation: 2 + 20 + ? = 100

A total of 245 chairs are needed for a school performance. 169 chairs are already in place. How many more chairs need to be put in place?

A school library has 387 books. They receive a donation of 79 books. How many books are in the library now?

Using four cards from the digit set [1], [2], [3], [4], [5], [6] without repeating any digit, which pair of 2-digit numbers sums exactly to 60?

Four statements about odd and even numbers are listed below. Which statement is FALSE?

Which general statement describes the result of adding four even numbers together?

Is it always, sometimes, or never true that the sum of four even numbers will divide exactly by 4?

What type of number do you always get when you subtract an odd number from an even number (even - odd)?

According to the learning materials, what does it mean to make a generalisation in mathematics?

In a 3x3 grid containing the numbers 1 to 9, every row sum is an odd number. What is the parity of the sum of all 9 numbers combined?