DELHI POLICE CONSTABLE EXAM., 2007*

A number becomes $87$ on subtracting $27\frac{1}{2}\%$ from it. What is the number?

A man sells $320$ mangoes at the rate of $400$ selling price. His profit is (in percentage):

If a student walks to his college at the speed of $5km/hr$ he is late by $30min$. If he walks at $6km/hr$, he is late only by $5min$. How far is the college from residence?

A $700 m$ long train is running at $72km/hr$. If it crosses a tunnel in one minute, how long is the tunnel?

Where did Kasturba Gandhi breathe her last?

A boat is moving in the direction of the wind and reaches $60\mathrm{km}$ in $4 \mathrm{hours}$. If the speed of the boat is double the speed of the wind, then tell how far the boat can go in $2 \mathrm{hours}$ in the opposite direction of the flow.

A man walked $5 km$ in the north-west and turns to the south. He walks $4 km$ and stops. How far is he from his starting point?

What should be the number coming in last of the given series?
$11, 14, 20, 29,?$