exam Maths Puzzle Numerical Ability

please help me to solve this:
If two numbers are both increase by ten there product is increase by 550. if twice the smaller number exceeds the larger by 15, find the numbers.

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exam Other Question

The sum of the first 3 terms of a geometric series is 37/8. The sum of the first six terms is 3367/512. Find the ratio and first term 7sqrt7x+5sqrt7x

The instruction says to "simplify". Can someone show me how to do this one?

Thank you!