Arithmetic - examples
- Time gone
Square of Richard age equals the age of his mother. When he will bw two times older then his mom will be 7/2 times older than he. How old is Richard and his mom?
- Evaluate expression
Evaluate expression using BODMAS rule: 1 1/4+1 1/5÷3/5-5/8
- Cube and sphere
Cube with the surface area 150 cm2 is described sphere. What is sphere surface?
Is the number 214743 divisible by 10?
Frank bought 6 same chocolates for 12 Eur. How many euros he pay for 19 chocolates?
- One half
One half of ? is: ?
The parents had 2 daughters. Each of them had one brother. How many members family had?
One brick is 2 kg and half a brick heavy. What is the weight of one brick?
5 trees in 3 lines grows in the orchard. How many trees are in the orchard?
A cyclist passes 88 km in 4 hours. How many kilometers he pass in 8 hours?
I have 12 balls and my friend has 18. About how many has my friend more balls?
Compare fractions ?. Which fraction of the lower?
- Is right?
Is triangle with sides 24, 51 and 45 right triangle?
Compare with characters >, <, =: 63.79 ? 63.79
Calculate how many hours take holidays, if take 1 weeks.
- 7 heroes
5 heroes galloping on 5 horses behind. How many ways can sort them behind?
The root of the equation ? is: ?
- Reverse Pythagorean theorem
Given are lengths of the sides of the triangles. Decide which one is rectangular: Δ ABC: 73 m, 66 m, 51 m ? Δ DEF: 63 cm, 105 cm, 84 cm ? Δ GHI: 50 dm, 48 dm, 14 dm ? Δ JKL: 31 m, 45 m, 40 m ? Δ MNO: 28 m, 53 m, 45 m ?
In how many ways can 7 shuttle vans line up at the airport?
55 weeks is equal to how many days?