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100

Who was the first president?

George Washington

100

The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:


153600

100

How big is the Earth?

3,959 mi

100

Is the Sun a star?

Yez

200

When was  Martin Luther King Jr born? 

Martin Luther King Jr. was born in 1929 in Atlanta, Georgia.

200

An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is

4.04%

200

Will the Earth crash into the Sun?

 The short answer is YES, we will someday collide with the sun (when the sun becomes a red giant), but NO we are not slowly being pulled in.

200

Why is the Sun hot?

The core of the sun is so hot and there is so much pressure, nuclear fusion takes place: hydrogen is changed to helium. Nuclear fusion creates heat and photons (light). The sun's surface is about 6,000 Kelvin, which is 10,340 degrees Fahrenheit (5,726 degrees Celsius)

300

What did Martin Luther King do to become a hero?

Martin Luther King, Jr. was a well-known civil rights leader and activist who had a great deal of influence on American society in the 1950s and 1960s. His strong belief in non-violent protest helped set the tone of the movement.

300


The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?

18 cm

300

Jim drove 768 miles of a 1200 miles journey. How many more miles does he need to drive to finish his journey?

  1. The number of miles to drive to finish his journey is given by

    1200 - 768 = 432 miles


  2. The rectangle on the left and the square on the right have the same perimeter. What is the length of one side of the square?

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    Solution

    The perimeter P of the rectangle is equal to

    P = 15 + 25 + 15 + 25 = 80

    The perimeter of the square is equal to the perimeter of the rectangle and is then equal to 80. The square has 4 sides of equal lengths. Since

    80 = 20 + 20 + 20 + 20

    then the length of a side is equal to 20


  4. There are 123 boxes of sweets in a store. There are 25 sweets in each box. How many sweets are in the store?

    Solution

    To find how many sweets, we multiply 123 by 25

    123 × 25 = 3075 sweets


  5. There are 365 days in one year, and 100 years in one century. How many days are in one century?

    Solution

    In 100 years, which is one century, there

    365 × 100 = 36,500 days


  6. Billy read 2 books. He read the first one in one week with 25 pages everyday. He read the second book in 12 days with 23 pages everyday. What is the total number of pages that Billy read?

    Solution

    Pages read in the first book in one week which is 7 days with 25 pages everyday.

    25 × 7 = 175 pages

    Pages read in the second book in 12 days with 23 pages everyday.

    23 × 12 = 276 pages

    Total number of pages read

    175 + 276 = 451 pages


  7. 123 school girls are to be transported in small vans. Each van can carry 8 girls only. What is the smallest possible number of vans that are needed to transport all 123 school girls?

    Solution

    To find the number of vans, we divide 123 by 8.

    123 ÷ 8 = 15 and remainder = 3

    So 15 vans are needed to transport 15 × 8 = 120 girls, and 1 van is needed to transport the 3 remaining girls. A total of 16 vans are needed.


  8. John had $100 to buy drinks and sandwiches for his birhtday party. He bought 5 small boxes of drinks at $4 each box and 8 boxes of sandwiches at $6 each box. How much money was left after the shopping?

    Solution

    Money spent on drinks

    5 × 4 = $20

    Money spent on sandwiches

    8 × 6 = $48

    Total money spent

    20 + 48 = $68

    Money left after shopping

    100 - 68 = $32


  9. A factory produces 5500 toys per week. If the workers at this factory work 4 days a week and if these workers make the same number of toys everyday, how many toys are produced each day?

    Solution

    To find the number of toys produced every day, we divide the total number of toys produced in one week (of 4 days) by 4.

    5500 ÷ 4 = 1375 toys


  10. Tom, Julia, Mike and Fran have 175 cards to use in a certain game. They decided to share them equally. How many cards should each one take and how many cards are left?

    Solution

    To know how many cards each should take, divide 175 by 4 (Tom, Julia, Mike and Fran).

    175 ÷ 4 = 43 with remainder = 3

    Each one should take 43 cards and 3 are left.


  11. The shaded shape is made of 5 congruent squares. The side of one square is 4 cm. Find the total area of the shaded shape.

     .

    Solution

    The area of one square is equal to

    4 × 4 = 16 centimeters squared

    The whole shape has 5 squares. The total area is

    16 + 16 + 16 + 16 + 16 = 80 centimeters squared

    or 16 × 5 = 80 centimeters squared


  12. Sam, Carla and Sarah spent on afternoon collecting sea shells. Sam collected 11. If we add the number of sea shells collected by Sam and Carla, the total would be 24. If we add the number of sea shells collected by Carla and Sarah, the total would be 25 shells. How many shells did each one collect?


  13. Mr Joshua runs 6 kilometers everyday from Monday to Friday. He also runs 12 kilometers a day on Saturday and Sunday. How many kilometers does Joshua run in a week?


  14. Tom and Bob are brothers and they each had the same amount of money which they put together to buy a toy. The cost of the toy was $22. If the cashier gave them a change of 6$, they would have to pay 11dollars.


300

Why is the Earth colorful?

The way light reflects off air molecules has an effect on the way people see the sky as well as the ocean. When orbiting the Earth, satellites and astronauts see a blue globe due to some of these same properties. The sheer amount of water on Earth makes it appear blue in these instances, but there are other factors as well.

300

Can the Sun burn the Earth?

The Sun survives by burning hydrogen atoms into helium atoms in its core. In fact, it burns through 600 million tons of hydrogen every second.

And as the Sun’s core becomes saturated with this helium, it shrinks, causing nuclear fusion reactions to speed up - which means that the Sun spits out more energy.

In fact, for every billion years the Sun spends burning hydrogen, it gets about 10 percent brighter.

400

Ulysses S. Grant appears on the front of which denomination of US. currency?

$50 bill

400

A rectangle has a length of 6 inches and a width of 4 inches. The area is  (blank square)   in2

Mmm.. i don know

400

The areas, in kilometers squared, of some countries are given below. USA: 9,629,091, Russia: 17,098,242, China: 9,598,094, Canada: 9,984,670, the UK: 242,400 and India: 3,287,263

The smallest area is 242,400 kilometers squared and it is that of the UK.

b) The largest area is 17,098,242 kilometers squared and corresponds to Russia.

c) The difference between the areas of Russia and China is given by

17,098,242 - 9,598,094 = 7,500,148 kilometers

400

Why does the Earth spin?

The Sun formed from the bulge at the center of this disk, and the planets formed further out. They inherited their rotation from the overall movement of the Solar System itself. 

400

How hot is the sun?

5,778 K