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People in History
Do you know?
100

What is the longest side of the right-angle triangle called?

The hypotenuse

100

Who invented paint by number?

 Leonardo Da Vinci

100

How many digits of pi are there?

Infinity

200

What is an angle called if it’s greater than 90 degrees?

Obtuse

200

Who was considered the fastest human calculator?

Scott Flansburg. He added the same number to itself 36 times in 15 seconds.

200

When something is going to occur, which mathematical term is used to express the likelihood of the event?

"Probability"

300

What number is represented in Roman numerals by the letter D?

500

300

 How old was Isaac Newton when he developed integral calculus?

23 years old

300

What is the smallest perfect number?

Number ‘6’ is the smallest perfect number, as the sum of 1, 2, and 3, together make 6.


400

There were some people on a train.

19 people get off the train at the first stop.

17 people get on the train.

Now there are 63 people on the train.

How many people were on the train to begin with?

Let x represent the initial number of people on the train before the first stop.

  • 19 people get off: x - 19
  • 17 people get on: (x - 19) + 17
  • Final count is 63: x - 19 + 17 = 63

- 19 + 17 = -2

x - 2 = 63         x = 63 + 2         x = 65

400

A NASA "human computer" whose trajectory calculations were critical to the success of the first U.S. manned spaceflights, including John Glenn's orbit.

Katherine Johnson (1918–2020)

400

What is the only number that has the same number of letters as its meaning?

Four: F O U R = 4

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