Question

1. I am less than half of 50.
2. I am more than 2 tens and less than 3 tens.
3. The tens digit is one more than the ones digit.
4. Together, the digits have a sum of 3.
What number am I?

• A. 21

Answer 1

The correct option is A 21
1. Half of 50 is 25. So, the number is less than 25.

2. 2 tens is 20 and 3 tens is 30. So, the number lies between 20 and 30

3. Between 20 and 30 all numbers starts from 2. So, the tens digit is 2. As, tens digit is one more than the ones digit, ones digit will be 1.
Therefore, the number is 21.

4. Together, the digits have a sum of 3. If we add 2 and 1 in 21, we get 3.

$\therefore$ The number is 21.