Red top of matchstick is not just for colour !!!
It is the striking head .....
No.... No.....
It is not made of red phosphorus !!!
The red colour is from -----
1. Potassium chlorate , This provides oxygen to burn
2. Antimony Sulphide , Act as fuel
3. Iron Oxide , Acts as red dye
What we use today as match sticks,
The red head DOESN'T CONTAIN phosphorus !!!!
The phosphorus is on brown strip .....
The red head only ignites when rubbed against this brown strip.
This question was asked on Koun Banega Karodpati program.
Question
Which material is used in car's wiper blade to clear water ?
1. Copper
2. Rubber
3. Wood
4. Titanium
Answer
Main material is rubber !!
Most vipors are made of -----
Natural rubber --- cheap ones, soft.
But wears out fast on Sun .
.
Silicon rubber -- Good quality ones
Lasts longer, doesn't make noise.
Good for heat
Long tung is basically a surviving tool for living in tall., spiky trees.
Giraffe tongue is 45 to 50 m long !!!
Giraffe has long tongue mainly for these reasons ----
1. Reaching food
2. Protecting themselves
3. Keeping calm
Giraffes eat mostly Acacia trees. These trees are tall and covered with thorns.
Giraffes can reach this much height and their long tung lets it strips leaves between the thorns without getting poked !!!
Tongue is super tough and muscular. Thick leathery skin + lots of saliva helps it slide past thorns without getting cut.
With long tongue, giraffes clean their face, eyes and ears !!!
This question was asked on Koun Banega Karodpati program.
Question
While dividing 80 Rs between 4 friends, if 3 receive 22 each how much remaining friend get ??
14 22 8 16
Answer
If Rs 80 get equally divided between 4 friends, each one would get Rs 20 !!!
But alas , that's not the case here ......
Out of 4, 3 people are getting Rs 22 each.
If 3 people get 22 Rs each,
Sum would be 22 + 22 + 22
==>> 66.
Out of 80 Rs, 3 are together getting Rs 66 !!!
==>> Fourth friend will get
==>> 80 - 66
==>> 14 Rs !!!!
Question
An agent gets a commission of 2.5% on sales of cloth. If on a certain day, he gets Rs 12.5 as the commission, what is the worth of the cloth sold on that day ??
Answer
Given ----
Commission rate = 2.5%
Commission amount = Rs 12.50
Total worth of the cloth sold = x = ??
We know,
Commission amount = commission rate * total sales
==>> 12.50 = 2.5% * x
==>> 12.5 = 2.5 /100 * x
==>> 12.5 * 100 = 2.5 x
==>> 1250 = 2.5 x
==>> x = 12500/25
==>> x = 500
Total worth of cloth sold = 500 Rs
