Challenging Questions( Week 50 Practice) 1. There are a total of 25 motorcycles (2-wheel) and cars (4-wheel) in a parking lot. Together, there are 68 wheels. How many motorcycles and cars are there respectively?(Only write down the numbers separated by a comma.) 2. There are a certain number of ducks and rabbits, which have 20 heads and 52 legs all together. How many ducks and rabbits are there respectively? (Only write down the numbers separated by a comma). 3. Draw a polygon with 6 sides. How many diagonals can you draw inside the polygon? 4. 2n is n 2s multiplied together. 22 = 2 × 2 = 4 and its last digit is 4, 24 = 2 × 2 × 2 × 2 = 16 and its last digit is 6. What is the last digit of 26? 5. The average of 6 numbers is 13. Suppose 34 is added the group. What is the new average of all the numbers? |