Maths practice for 12-year-olds - page 9 of 355

Number of problems found: 7083

Men at work
8 men can finish a piece of work in 40 days. If 2 more men joined with them, then how many days it will take to complete the work?
Unknown en
I think of a number. If I subtract 9 from it and multiply this difference by 4, the result is 128. Form an equation and solve it to find the number.
Dividing money 7
A: B: C is in the ratio of 3:2:5. How much money will C get out of Rs 1260?
Bob types
Bob types 260 words in 2 and 1/2 of a minute. How many words per minute?
A pair 2
Jane is 5 years older than Tom. In 3 years, the sum of their ages will be 41. How old are Jane and Tom now?
Working day
Greg spends 1/4 of his workday in meetings and 1/12 of his workday answering phone calls. What is the total fraction of his workday that Greg spends in meetings or on phone calls?
Add five to lcm
The least number, which, when diminished by 5, is divisible by each of 21, 28, 36, and 45.
A triangular prism
Find the number of faces, edges, and vertices of a triangular prism.
Front porch
Jon's front porch is 8 feet wide and 12 feet long. Jon wants to stain the wood on the porch next weekend. The stain costs $1.00 per square foot. How much will it cost to buy enough stain for the whole porch?
Whole and fractions
3 whole one by 8 + (- 1 by 4)
Ayden
Ayden is 140 cm tall, and his friend Alex is 1/5 taller than him. How tall is Alex?
Divisible by three
What least value must be assigned to the unknown x so that the number 789x563 is divisible by 3?
Mr. Stephan
Mr. Stephan cycled at an average speed of 15 km/h for 10 km. He then cycled another 12 km at an average speed of 18 km/h. Please find the total time taken for his journey.
Glass cleaner
A 2-pint bottle of glass cleaner costs $13.44. What is the price per fluid ounce?
Square yards
What is 4 1/3 yards times 5 2/3 yards?
Kevin and Mary
Kevin is 4 times as old as Mary was 2 years ago. In seven years Mary will be as old as Kevin is now. How old are they now.
Train same direction
Find the time taken by a train 170 m long, running at the speed of 83 km/h, to cross another train 180 m running at the speed of 65 km/h in the same direction.
Mean and sum
If the arithmetic mean of 6 numbers is 45, what is the total sum of these numbers?
Older or younger
The age of a man after 15 years is 4 times the age of that man 15 years before. Find his present age.
A cake 2
Karen sliced a cake into 10 slices. She ate 2/10 of it and after some time she ate another 4/10 of it. How much of the cake did Karen eat?

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