A rectangular courtyard with length 3 m 78 cm and breadth 2 m 70 cm is to be paved with square stones of the same size. Find the least number of such stones required.
Jack went kayaking last weekend. He kayaked for ^@2^@ hours and covered ^@10^@ kilometres on Friday. He kayaked for ^@4^@ hours and ^@12^@ kilometres on a different river on Saturday. Jack kayaked at a faster average speed on which of the days?
Elliott's baseball team is practicing hitting in the batting cages. The pitching machines pitch baseballs at a rate of ^@20^@ pitches in ^@4^@ minutes. Elliott practiced hitting for ^@8^@ minutes. How many baseballs were pitched to Elliott in that time?
Four problem figures are given below. There exists a relationship between the first two problem figures. A similar relationship should exist between the third and fourth problem figures. Identify the fourth figure.
There are a few integer values of ^@a^@ such that ^@\dfrac{ a^2 - 11 a - 11 }{ a - 6 }^@ is an integer. Find the sum of all these integer values of ^@a^@.