Tom strings together the numbers from 1 to 20 and obtains the 31-digit number 1234567891011121314151617181920.
Then he deletes 24 digits of the number, so that the remaining number is as big as possible.
Which number does he obtain?
(A) 9671819 (B) 9567892 (C) 9781920 (D) 9912345 (E) 9818192

40 describe the outliers from the scatter plot.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree