Grade 11 Math Riddles Challenge
Engage your critical thinking skills with these challenging math riddles designed for Grade 11 students.
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Grade 11 Math Riddles Challenge
Name:
Date:
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Read each math riddle carefully and use your problem-solving skills to find the correct answer. Show your work where applicable.
1. I am an odd number. Take away one letter and I become even. What number am I?
2. What has an infinite number of sides and an infinite number of angles?
3. I am a three-digit number. My second digit is four times as big as the third digit. My first digit is three less than my second digit. What number am I?
4. If a zookeeper had 10 pairs of animals in her zoo, and if 2 pairs of babies were born for each of the animals, but then 20 animals ran away, how many animals does she have left?
5. I add 5 to 9 and get 2. The answer is correct, but how?
It's a trick question, the answer is 14.
You are adding hours on a clock.
You are counting in base 12.
The numbers are negative.
6. What is the largest number you can write using only two digits?
99
9^9
Infinity
9!
7. Using only addition, how can you add eight 8s to get the number 1,000?
8. A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?