During a $12$-hour period, the temperature which dropped by a fixed value every hour declined ${36}^{\mathrm{o}}\mathrm{C}$. How many degrees did the temperature drop each hour?

An insect climbs $2 \mathrm{cm}$ up a slippery rod in one second and slips down by $1 \mathrm{cm}$ over the next second. How many seconds will the insect take to reach the top of the rod $15 \mathrm{cm}$ high?

Start with integer $2$. Add $-3$ to it. Multiply the answer by $10$. Then subtract $5$ from it. Now divide the result by $3$ and then add $40$ to it. What number do you get at last?

Vaibhav is an enthusiastic sports boy. While practising long jump, he managed $90 \mathrm{cm}$ on the first day. Second day onwards he managed to jump $2 \mathrm{cm}$ longer than the previous day and so on. On the sixth day, how long did he jump?

In a true-false test containing $50$ questions, a student is to be awarded $2$ marks for every correct answer and $-2$ for every incorrect answer and $0$ for not supplying any answer. If Yash secured $92$ marks in a test, what are the possibilities of his marking correct or wrong answer?

A multistorey building has $25$ floors above the ground level each of height $5 \mathrm{m}$. It also has $3$ floors in the basement each of height $5 \mathrm{m}$. A lift in the building moves at a rate of $1 \mathrm{m}/\mathrm{s}$. If a man starts from $50 \mathrm{m}$ above the ground, how long will it take him to reach the $2^{\mathrm{nd}}$ floor of basement?

The moon experiences many extremes in temperature because it has no atmosphere. For example, on the side of the moon the sun is shining on, the temperature can reach ${260}^{\mathrm{o}}\mathrm{F}$. On the dark side of the moon, it gets as cold as $-{280}^{\mathrm{o}}\mathrm{F}$. How much is the drop in temperature from day to night?

The freezing point of oxygen is $-{217}^{\mathrm{o}}\mathrm{C}$ and hydrogen is nearly $-{259}^{\mathrm{o}}\mathrm{C}$. A lab is lowering the temperature inside a fridge. Which will freeze first? How much colder does it have to be for both to freeze?

An elevator descends into a mine shaft at the rate of $6$ metre per minute. If the descendent starts from the ground level, how long will it take to reach $240$ metres?