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Brainteasers
https://www.tes.com/magazine/archive/brainteasers-88
Presents
Zoe, Laura, Sam, Ali and Craig each gave one of the others a present. No one got two presents.
Laura received a CD. Ali received a book. Craig gave a video.
Ali gave a scarf, but not to Craig.
Sam gave a puzzle and did not receive the scarf.
What gave what and who got what?
Age 11-15
Isosceles triangles
Draw and label an isosceles triangle ABC, where D is a point on the side BCso that the line AD divides ABCinto two new isosceles triangles, ABDand ACD.
What size are the angles of triangle ABC? There are two possible solutions.
Brainteaser solutions
from page 30
Presents
Person gave received
Zoe CD scarf
Laura book CD
Sam puzzle video
Ali scarf book
Craig video puzzle
Isosceles triangle
36 LESS THAN , 72 LESS THAN and 72 LESS THAN or 90 LESS THAN , 45 LESS THAN , 45 LESS THAN
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