Power - examples
- One half
One half of ? is: ?
- Cube diagonal
Determine length of the cube diagonal with edge 55 dm.
Kate thought a five-digit integer. She wrote the sum of this number and its half at the first line to the workbook. On the second line wrote a total of this number and its one fifth. On the third row she wrote a sum of this number and its one nines. Fi
- Compare II
Which of the numbers 158, 815 is greater?
- Area codes
How many 6 digit area codes are possible if the first number can't be zero?
- Circle chord
What is the length d of the chord circle of diameter 58 mm, if distance from the center circle is 24 mm?
Is true for any number a,b,c,d equality:? ?
If the product twice price cut by 20%, what percentage was price cut in total?
What is bigger? ?
- Proof I
When added to the product of two consecutive integers larger one, we get square larger one. Is this true or not?
- No. of divisors
How many different divisors has number ??
How many is subsets of set ??
Price of the new machine is € 56000. Every year is depreciated 16% of residual value. What will be the value of the machine after 5 years?
- Morse alphabet
Calculate how many words of Morse code to create compiling commas and dots in the words of one to five characters.
- Volume from surface area
What is the volume of the cube whose surface area is 96 cm2?
The lottery is 41000 elk in which 7300 wins. What is the probability that the purchase of 17 elks won nothing?
- Motion problem
From Bratislavy to Martina go car at speed 83 km/h. From Martina to Bratislavy go another car at speed 62 km/h. How many minutes before the meeting will be cars 21 km away?
- Is equal
Is equal following terms? ?
One pull of wire is reduced its diameter by 9%. What will be diameter of wire with diameter 9 mm over 8 pulls?
How many real roots has equation ? ?