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Mathematics
Select a Standard
The Co-ordinates – A Game
Geo-Engine (Std I)
Rythmic Maths (Std I)
Adding in many ways (Std I)
Calculative Colouring (Std II)
Number Race (Std II)
Mental Trial (Std III)
Time story (Std III)
Calendar (Std IV)
Division of three-digit numbers (Std IV)
Mathematically speaking (Std V)
What makes 100 % ? (Std V)
Weight Check (Std VI)
Ratio (Std VI)
Park Survey (Std VII)
Ratio Quiz (Std VII)
Ratio Quiz (Std VII)
This activity can be conducted after the completion of the unit on “Ratio”
Objectives:
To enable the students to: frame ratios and solve the riddles.
Instructions to teachers:
1. Divide the students into two groups.
2. Ask the riddles one by one.
3. Give 5 points for each correct answer.
4. Do not deduct any points if the given answer is wrong.
The team that scores greater number of points is declared the winner.

What's in Anchor

The Riddle
 
1. I am the ratio of the least 3-digit number to the greatest 3-digit number. Who am I?
2. I am the ratio of the number ‘100 less than 949’ to the number ‘100 more than 949’. 
Who am I?
3. I am the ratio of the only even prime number to the least odd prime number. Who am I?
4. I am the ratio of the difference between 19 and 34 and the sum of 19 and 34. Who am I?
5. I am the ratio of the 2nd power of 10 to the 3rd power of 10. Who am I?
6. I am the ratio of the greatest common factor of 4 ´ 6 to the least common multiple of 4 ´ 6. Who am I? 
7. I am the ratio of the least factor of 36 to its greatest factor. Who am I?
8. There are 3 numbers – 0.5, 1.5 and 4. I am the ratio of their sum to their product. 
Who am I?
9. I am the ratio of the ‘right angle’ to the ‘sum total of all the angles’ in a right-angled triangle. What am I?
10. I am the ratio of the number of sides of a square to the number of sides of a hexagon. 
Who am I?