exam Maths Puzzle Numerical Ability

A 18-FOOT LADDER IS LEANED AGAINST A WALL. IF THE BASE OF THE LADDER IS 7 FEET FROM THE WALL . hOW HIGH ON THE WAL WILL THE LADDER REACH?

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exam Other Question

tickets $20 for singles and $35 for couples, Sales $2280 and 128 people, how many of each sold? Find the sum of the first thirty terms of the following arithmetic series:
16+25+34+43...