Page 25 - NUMINO Challenge_C2
P. 25
Creative Thinking
1 It takes 1 second for Tom to type 1 key. How long will it take to type the
numbers from 1 to 1,000? Tom always types at the same speed and he
does not take any break.
2 How many 5’s are there in the numbers from 1 to 999? How many
numbers have the digit 5 as one of its digits?
22 NUMINO Challenge C2
1 It takes 1 second for Tom to type 1 key. How long will it take to type the
numbers from 1 to 1,000? Tom always types at the same speed and he
does not take any break.
2 How many 5’s are there in the numbers from 1 to 999? How many
numbers have the digit 5 as one of its digits?
22 NUMINO Challenge C2
