# Arithmetic - math word problems

1. Center Calculate the coordinates of the circle center: ?
2. Hours How many hours is 9 days?
3. ABS What is the value of ? ?
4. Exp If ?, then n is:
5. Candy How many ways can divide 10 identical candies to 5 children?
6. Reciprocal What is the reciprocal of the sum of the reciprocals of 4 and 9?
7. Product The sum and the product of three integers is 6. Write largest of them.
8. Gain Find the gain whenever the output power is 21x the input power.
9. It is rectangular? Size of two of the angles in a triangle are: α=110°, β=40°. Is it a right triangle?
10. Triangle For how many integer values of x can 16, 15 and x be the lengths of the sides of triangle?
11. Opposite numbers Calculate opposite numbers (additive inverse) to given ones:
12. Tetrahedral pyramid What is the surface of a regular tetrahedral (four-sided) pyramid if the base edge a=16 and height v=16?
13. Segments Which of the pairs of numbers on the number line encloses the longest segment: ?
14. Decibel A circuit has an input power of 58 mW. Its output power is 6 mW. What is the loss in decibels?
15. RWY Calculate the opposite direction of the runway 13. Runways are named by a number between 01 and 36, which is generally one tenth of the azimuth of the runway's heading in degrees: a runway numbered 09 points east (90°), runway 18 is south (180°), runway
16. Root The root of the equation ? is: ?
17. Two boats Two boats are located from a height of 150m above the surface of the lake at depth angles of 57° and 39°. Find the distance of both boats if the sighting device and both ships are in a plane perpendicular to the surface of the lake.
18. Null points Calculate the roots of the equation: ?
19. Observer The observer sees straight fence 100 m long in 30° view angle. From one end of the fence is 102 m. How far is it from the another end of the fence?
20. School trip School trip cost 247.2 Eur for one class (24 students). How much would cost a trip for two classes? (both classes together have 53 students)

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