book Maths Puzzle Numerical Ability

i know it is very simple but to solve
x^2 + 49=?

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book Other Question

jo has 37 coins(all nickels, dimes, and quarters) worth $5.50 she has 4 more quarters than nickels how many dimes does jo have How long will it take a bus traveling at 60 miles per hour to overtake a car traveling at 40 miles per hour if the car had a 1.5-hour head start?