Friday, December 3, 2021

The 12 Days of Christmath Day 3

 Here are the day 3 puzzles for the 12 Days of Christmath challenge. Enjoy!

Primary

There are 10 circles arranged in a triangle (a row of 1, a row of 2, a row of 3, a row of 4). Each circle is the sum of the two circles below it. the bottom row is an 8, a 7, a blank, a 9. The middle row is a blank, a blank, a 9. What number will go in the top circle?
Primary (French)
There are 10 circles arranged in a triangle (a row of 1, a row of 2, a row of 3, a row of 4). Each circle is the sum of the two circles below it. the bottom row is an 8, a 7, a blank, a 9. The middle row is a blank, a blank, a 9. What number will go in the top circle?
Junior
There are 10 circles arranged in a triangle (a row of 1, a row of 2, a row of 3, a row of 4). Each circle is the sum of the two circles below it. What four consecutive numbers go in the bottom row to get 206 in the top circle?
Junior (French)
There are 10 circles arranged in a triangle (a row of 1, a row of 2, a row of 3, a row of 4). Each circle is the sum of the two circles below it. What four consecutive numbers go in the bottom row to get 206 in the top circle?
Intermediate
There are 10 circles arranged in a triangle (a row of 1, a row of 2, a row of 3, a row of 4). Each circle is the sum of the two circles below it. What four prime numbers go in the bottom row to get 139 in the top circle?

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