6. |
The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number? |
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7. |
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: |
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8. |
A number consists of two digits. If the digits interchange places and the new number is added to the original number, then the resulting number will be divisible by: |
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9. |
Find a positive number which when increased by 17 is equal to 60 times the reciprocal of the number. |
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10. |
In a two-digit, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is: |
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