Number Combinations and Sums

The video tutorial guides students through solving a spider web puzzle. The objective is to place numbers from 1 to 11 in a way that each row sums to 17, with one number left over. The tutorial demonstrates finding five different combinations to achieve this goal, using a step-by-step approach to test and verify each combination. The process involves trial and error, with the teacher explaining the logic behind each step and ensuring the sum of each row is correct.

What is the main objective of the spider web puzzle?

• To use all numbers without repetition

• To arrange numbers so that each row sums to 17

• To arrange numbers in ascending order

• To find the largest number in the puzzle

Which number is placed in the center of the web?

• 7

• 5

• 11

• 10

In the first combination, which numbers are used to achieve the sum of 17?

• 8, 5, 4

• 1, 5, 11

• 2, 5, 10

• 3, 5, 9

What is the second combination of numbers that sums to 17?

• 1, 5, 11

• 2, 5, 10

• 5, 5, 7

• 3, 5, 9

Which number was tried but not used in the second combination?

• 8

• 9

• 10

• 11

In the third combination, which numbers are used to achieve the sum of 17?

• 3, 5, 9

• 2, 5, 10

• 8, 5, 4

• 1, 5, 11

Which number was initially tried but not used in the third combination?

• 10

• 9

• 8

• 7

What is the fourth combination of numbers that sums to 17?

• 2, 5, 10

• 8, 5, 4

• 1, 5, 11

• 3, 5, 9

Which numbers are used in the fifth combination to achieve the sum of 17?

• 3, 5, 9

• 2, 5, 10

• 1, 5, 11

• 5, 5, 7

Which number is left over after all combinations are made?

• 8

• 6

• 7

• 5