exam Maths Puzzle Numerical Ability

solve for y. sqrt(y)+18=4

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exam Other Question

In 1994, the life expectancy of males in a certain country was 70.6 years. In 1998,it was 73.8 years. Let E represent the life expectancy in year t and let t represent the number The product of two numbers is 5 and the sum of their reciprocals is 9/10. Find the numbers.