exam Maths Puzzle Numerical Ability

A 15FT LADDER LEANS AGAINST A BULIDING. THE BOTTOM OF THE LADDER IS 7FT FROM THE BUILDING.HOW HIGH IS THE TOP OF THE LADDER?ROUND TO 2 DECIMAL PLACES.

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exam Other Question

Terminator Bug Company bonds have 14% coupon rate. Interest is paid semi-annually. The bonds have a par value of $1,000 and will mature 10 years from now. Compute the value of Term My teacher recently told us
ELEVEN plus THREE equals TWO.

And she wants us to figure out how.
So how does
11 + 3 = 2?