MATH CROSSWORD

4. A person invests eight thousand rupees at six percent per annum for four years. Calculate the simple interest.
7. A man borrows twelve thousand rupees at ten percent per annum for two years. Find the simple interest.
8. Express eight point two three multiplied by ten to the power of two as an ordinary number.
10. Out of five hundred students, one hundred twenty are absent. What percentage are present?
13. A population increases from twelve thousand to fifteen thousand in one year. Find the percentage increase.
14. A plane travels nine hundred kilometres in one hour thirty minutes. Find its average speed in kilometres per hour.
15. A jacket costs two thousand rupees and is on sale for twenty percent off. What is the sale price?
16. Multiply and give the ordinary number three multiplied by ten to the power of three times two multiplied by ten to the power of three.
18. Divide and give the ordinary number six multiplied by ten to the power of eight divided by three multiplied by ten to the power of four.

1. Decrease three hundred sixty by fifteen percent.
2. Simplify three upon root nine.
3. Convert two hours forty-five minutes into seconds.
5. A train leaves at eight fifteen and arrives at eleven forty. How long was the journey in minutes?
6. Simplify square root forty-nine plus square root thirty-six.
7. A sum of fifteen thousand rupees earns simple interest of four thousand five hundred rupees in three years. Find the rate of interest per annum.
9. Express eight point two three multiplied by ten to the power of three as an ordinary number.
11. A sum of five thousand rupees is invested at eight percent per annum for three years. Find the simple interest.
12. If x equals root three plus two, find the value of x squared minus four x plus one.
15. Simplify fully two root eighteen upon root two.
17. A swimmer completes four laps in six minutes. How long will it take to complete ten laps at the same speed?