Time - practice for 12 year olds - page 10 of 51
Number of problems found: 1006
- Schoolyard 79854
The children ran the school relay four times around the schoolyard. The shortest measured time was 2 minutes, and the longest was 3 minutes. In what was the longest and shortest time could the relay run around the yard? - Situation 78694
There is a geyser and a volcano in a nature reserve in Iceland. The geyser erupts regularly every 18 days, and clouds of smoke rise from the volcano every 40 days. how many times in the course of 9000 days will there be a situation where we can observe bo - Thabo
Thabo uses 3 ½ liters of petrol per week for his motorcycle. How long will he be driving with 49 liters? - Marksman 78334
The igniter cord used in normal quarry blasting burns at a rate of 8 mm/s, the length usually used is 60 cm. At what minimum speed must the marksman move to a shelter 150 m away?
- Competitor 78234
The first competitor completed the track in 2h12min11s. How much worse was the other's time of 2h19min3s? - O'clock 78004
What is the degree angle made by the hands of a clock when it points to 8 o'clock? - A molecule
A molecule travels with a speed of 8100 centimeters per minute (cm/min). How far would the molecule travel in centimeters in 3.19 seconds? - Express 66
Express 6 whole 7/10 hours in minutes. - How far 2
How far can a subway car travel in 1 hour if its average speed is 0.96 miles per minute?
- Fractions and mixed numbers
Evaluate: a=5/6 + 3/4 b= 2 1/2 + 3 2/3 c= 4/8 - 3/8 d= 5/10 - 3/10 e= 11 - 4/5 f= 6/9 - 3/5 g= 11 2/3 - 7 5/6 h= 3 X 2/7 i= 4/5 X 10/12 j= 1/2 X 9 X 6/12 k= 3 2/5 X 2 1/4 l= 2 2/6 X 5 1/7 - Sidewalk
Casey has 5/6 left of a section of sidewalk to clean. If he can clean 5/18 of a section in 1 minute, how long will it take him to clean what is left? - Jack had
Jack had 4 hours of school. He spent 45 minutes in the library and 1/2 hour on a science lecture and had a lunch break of 25 minutes. How much time is left for the school to get over? (Write the answer as a fraction.) - A sand
A sand timer has 5 5/16 ounces of sand. If the sand falls at a rate of 2.5 ounces per minute, how many minutes will the timer last? Write your answer as a fraction. - Jumping
You exercise for 3/4 of an hour. You jump rope for 1/3 of that time. What fraction of the hour do you spend jumping rope?
- A plumber 2
A plumber charges $29.00 for an hour of work. How much would he charge for a job that took him 1 3/4 hours to finish? - A welder
A welder has two pieces of half-inch pipe, one of length 2 3/8 ft and another of length 3 7/8 ft. What is the total length of the two welded together? How much must be cut off if she needs a total length of 4 3/4 ft? - Mr Ambayen
Mr. Ambayen had 3 6/7 hectares of land. He planted 1/5 of it for coconut trees and 1/2 for avocado trees. What fraction of Mr. Ambayen's land was planted with trees? - The melon
There was 1 3/6 melon left for dinner. At dinner time, the family ate 4/6 of the melon. What part of the melon was left for the next meal? - Jerrie
Jerrie can repair her car in 1 1/12 hours. A mechanic can do the same job in 8/12 hours. How much longer does it take Jerrie to do the job?
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