book Maths Puzzle Numerical Ability

Yuri has a board that is 98 in. long. He wishes to cut the board into two pieces so that one piece will be 10 in. longer than the other.What should the lenght of each piece be?

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book Other Question
The decibel level of sound is given by D= 10log ( I/10^−12), where I is the
sound intensity measured in watts per square meter. Find the
decibel level of a whisper at an intensity of 5.4 × 10-10 watts per Find the numberof possible 5-card hands that contain the cards specified.
5 face cards