A group of $1200$ persons consisting of captains and soldiers are travelling in a train. For every $15$ soldiers there is one captain. The number of captains in the group is

At the end of a business conference, ten people present all shake hands with each other once. How many hands will there be altogether?

A student got twice as many sums as he got right. If he attempted $48$ sums in all. How many did he solve correctly?

A farmer built a fence around his square plot. He used $27$ fences poles on each side of the square. How many poles did he need altogether?

If every $2$ out of $3$ readymade shirts needs alterations in sleeves and every $4$ out of $5$ needs it in the body, how many alterations will be required for $60$ shirts?

If a clock takes seven seconds to strike seven, How long will it takes to strike ten?

On children's day, sweets were to be equally distributed among $175$ children in a school. Actually on the children's day, $35$ children were absent and therefore each child got $4$ sweet extra. Total how many sweets were available for distribution? 

Between two books ends in your study are distributed your five favourite puzzle books. If you decide to arrange the five books in every possible combination and move just one book every minute, how long would it take you?

If $100$ cats kill $100$ mice in $100$ days, then $4$ cats would kill $4$ mice in how many days?