Page 16 - NUMINO Challenge_B2
P. 16
Problem solving Key Points
1 How many numbers are there in which the Think about the
hundreds digit is greater than the tens digit, and possibilities when
the tens digit is greater than the ones digit, as the hundreds digit is
shown below? a digit from 2 to 9.
763 321 975 641
2 All dates from January to December are The last two digits
expressed as 4-digit numbers, as shown below. represent the day of
How many dates are there in which the digits are the month. The
in increasing order from left to right? greatest number that
can be used is 29.
January 7th October 29th
0107 1029
13Number and Operations
1 How many numbers are there in which the Think about the
hundreds digit is greater than the tens digit, and possibilities when
the tens digit is greater than the ones digit, as the hundreds digit is
shown below? a digit from 2 to 9.
763 321 975 641
2 All dates from January to December are The last two digits
expressed as 4-digit numbers, as shown below. represent the day of
How many dates are there in which the digits are the month. The
in increasing order from left to right? greatest number that
can be used is 29.
January 7th October 29th
0107 1029
13Number and Operations
