exam Maths Puzzle Numerical Ability

In a two digit number, unit’s digit is 3 more than the ten’s digit. The number formed by interchanging the digits and the original number are in the ratio 7 : 4. Find the number

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Celsius temperature readings can be converted to fahrenheit readings using the formular F = 9 over 5 C+ 32. What is the fahrenheit tempature that corresponds to each of the following celsius temperatures:

15 Hello, I am trying to create a formula that will create a series of numbers based on knowing only 3 numbers of the series. This is not from a textbook but will be used to create a