Question

Okay, my child is doing problem solving lesson 5-7 in scott foresman addison wesley book. The question that we are having a problem with is a number line. there are 10 spaces in the number line and the clues are:
Clue 1: the number are between 70 and 82
Clue 2: the first number has 2 ones

same spaces for second problem.
Clue 1: the numbers are between 30 and 45.
Clue 2: the number before the last number has 2 ones.

any help you can provide would be greatly appreciated.

thanks

Answer 1

Ok,the first number is 72 (it has two ones), then 73, 74 ...

On the second, the number before the last has to be 42

This is using the unit digit as number Cubes, that is, two ones.