Number Sense ( Week 16 Evaluation) 2. 433 is a 3-digit number with each digit less than or equal to the digits in higher place values, i.e 3 ≤ 4 and 3 ≤ 3. How many such 3-digit number(s) are there between 450 and 499 inclusively? 3. If the odometer of a car reads 38,047 miles, what is the next odometer reading with at least four digits that are the same? 4. What is the greatest common factor (GCF) of 36 and 21? 5. In the product 17 × 18 × 19 × 20 × 21 × 22 × 23, which one of the seven numbers should be reduced by 1 to cause the smallest decrease in the product? 6. In the number sequence below, there is a number which is special. What is it?
16, 24, 32, 40, 48, 61. 7. What positive integers are equal to their rightest digit cubed? 8. Using all the numbers of 6, 11, 15, 17, 22 and +, +, −, × operators, can an even number and an odd number be produced respectfully? 9. Which of the following statements is correct? 10. Make a 5 using the following 5 numbers: 3, 4, 5, 8 and 7. You can use +,-,*,/, and ( ) as many times as you wish, but you need to use all 5 numbers and each number only once. |