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Problems with numbers
Problems
Here are 3 tasks. Keyboard input: you will need to enter one or several values as the answer.
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Question 1

Three-digit numbers
How many three-digit numbers are there in which the sum of the digits is 3?
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Question 2
19 -> 20
How do you write “nineteen” and then, by removing the one, get “twenty”?
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Question 3
An interesting number
Which number will be reduced by a third if you flip it?
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Problems with numbers
2 + 2 = 11 in the ternary number system—stay alert!
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