Examples for 8th grade - page 6
- Pool
The swimming pool is 6 m wide and 14 m long and 185 cm deep. How many hectoliters of water is in it, if the water is 9 cm below its upper edge. - OK circle
Calculate the radius (circumradius) of the circle described right triangle with hypotenuse long 17 and one cathetus long 1. - Number ratio
Calculate two positive numbers that its ratio is 4:4 and sum was 184. - Square diagonal
Calculate the length of diagonal of the square with side a = 18 cm. - Z9-I-4
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 - Invitations
For every 5 minutes writes Dana 10 invitations, while Anna 14 invitations. How long will write together 120 invitations? - Permill
How many permill is 1931 from 166456? - Compare II
Which of the numbers 158, 815 is greater? - Tunnels
Mice had built an underground house consisting of chambers and tunnels: • each tunnel leading from the chamber to the chamber (none is blind) • from each chamber lead just three tunnels into three distinct chambers, • from each chamber mice can get to any - Area codes
How many 6 digit area codes are possible if the first number can't be zero? - Madams
During the spring cleaning ladies going to wash windows. Mother takes wash all the windows 5 hours, the grandmother 3 times longer and Paula wash all windows in 5 hours. How many hours will spend washing the windows this "women's team" if working togethe - ABS
What is the value of ? ? - Radius
Determine the radius of the circle, if its perimeter and area is the same number. - 2nd class variations
From how many elements you can create 6480 variations of the second class? - Circle chord
What is the length d of the chord circle of diameter 58 mm, if distance from the center circle is 24 mm? - Accidents
The count of accidents in 1993 caused 8009 women which is 7.1%. How many men caused the accidents? - Number
What number is 24 % smaller than the number 51? - Ravens
The tale of the Seven Ravens were seven brothers, each of whom was born exactly 1.5 years after the previous one. When the eldest of the brothers was 4-times older than the youngest, mother all curse. How old was seven ravens brothers when their mother cur - Garden
Father dig up the garden in 13 hours. Son in 18 hours. How many hours take dig up the garden together? - Excavation
Mr. Radoslav calculated that excavation for a water connection dig for 10 days. His friend would take 7 days. Radoslav worked 3 days alone. Then his friend came to help and started on the other end. On what day since the beginning of excavation they met?
The swimming pool is 6 m wide and 14 m long and 185 cm deep. How many hectoliters of water is in it, if the water is 9 cm below its upper edge.
Calculate the radius (circumradius) of the circle described right triangle with hypotenuse long 17 and one cathetus long 1.
Calculate two positive numbers that its ratio is 4:4 and sum was 184.
Calculate the length of diagonal of the square with side a = 18 cm.
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
For every 5 minutes writes Dana 10 invitations, while Anna 14 invitations. How long will write together 120 invitations?
How many permill is 1931 from 166456?
Which of the numbers 158, 815 is greater?
Mice had built an underground house consisting of chambers and tunnels: • each tunnel leading from the chamber to the chamber (none is blind) • from each chamber lead just three tunnels into three distinct chambers, • from each chamber mice can get to any
How many 6 digit area codes are possible if the first number can't be zero?
During the spring cleaning ladies going to wash windows. Mother takes wash all the windows 5 hours, the grandmother 3 times longer and Paula wash all windows in 5 hours. How many hours will spend washing the windows this "women's team" if working togethe
What is the value of ? ?
Determine the radius of the circle, if its perimeter and area is the same number.
From how many elements you can create 6480 variations of the second class?
What is the length d of the chord circle of diameter 58 mm, if distance from the center circle is 24 mm?
The count of accidents in 1993 caused 8009 women which is 7.1%. How many men caused the accidents?
What number is 24 % smaller than the number 51?
The tale of the Seven Ravens were seven brothers, each of whom was born exactly 1.5 years after the previous one. When the eldest of the brothers was 4-times older than the youngest, mother all curse. How old was seven ravens brothers when their mother cur
Father dig up the garden in 13 hours. Son in 18 hours. How many hours take dig up the garden together?
Mr. Radoslav calculated that excavation for a water connection dig for 10 days. His friend would take 7 days. Radoslav worked 3 days alone. Then his friend came to help and started on the other end. On what day since the beginning of excavation they met?- «
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