not jeopardy

Math-ish

200

Solve x²=25, what is x?

5 and -5.

400

What prime is after 47?

53

600

Mathematically, which number is the largest?

a) Number of hours in a year.

B) Number of seconds in a day.

C) Number of days in a decade.

D) Number of Minutes in a week.

seconds a day.

800

A 10-ft rope ladder hangs over the side of a boat with the bottom rung on the surface of the water. The rungs are 1 foot apart. The tide goes up at a rate of 6 in/hr. How many tungs are above the water after 4 hours?

All 11, the ship rises with the tide, too.

1000

Prove that among the first 2n postitive integers, any collection of n+1 of them must contain a relatively prime pair.

Consecutive numbers must be relatively prime, and this collection must have at least two integers that are consecutive.