Power - examples
- One half
One half of ? is: ?
- Cube diagonal
Determine length of the cube diagonal with edge 91 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? ?
How many is subsets of set ??
- Proof I
When added to the product of two consecutive integers larger one, we get square larger one. Is this true or not?
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.
- No. of divisors
How many different divisors has number ??
The lottery is 41000 elk in which 7300 wins. What is the probability that the purchase of 17 elks won nothing?
- Volume from surface area
What is the volume of the cube whose surface area is 96 cm2?
- Is equal
Is equal following terms? ?
- 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?
How many real roots has equation ? ?
One pull of wire is reduced its diameter by 9%. What will be diameter of wire with diameter 9 mm over 8 pulls?