Multiplication and Division
Sequences
Pigeonhole Principle
Random
1

Solve 1 + 1

2 duh

1

Solve 10 * 5

50

1

What is the next term in this sequence? 1, 2, 3, 4, 5, 6, _

7

1
20 pigeons spread out among 19 pigeonholes. how many pigeons must share a pigeonhole with another pigeon.

2.

1

What does this is this elemental compound?

H2O

Water.

100

Solve 3 + (7 + 8) - 12

6

100

Solve 3 * 6 / 9

2

100

Is this a Geometric or Arithmetic Sequence?

7, 14, 28, 56, 112

Geometric.

100

in a bag, there are 4 green marbles, 4 red marbles, and 4 green marbles. how many marbles do you need to grab to guarantee you have 4 marbles of the same color?

10 marbles.

100

What is this in base 10?

12 + 39

51.

200

Solve 11 + 13 - 4 + 9 - (7 + 3) - 90

-71

200

Solve (8 * 6) / (3 * 4)

4

200

Find the Common Ratio.

2, 6, 18, 54, 162, ...

r =3

200

Show that in a group of 13 people, at least two people share a birthday within the same month.

because Pigeonhole Principle.

200

'1' + '1'

Hint, know programming.

300

Solve 99-98+97-96+95-94+ ... -3-2+1-0

50

300

Solve 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2

1024

300

Create an arithmetic sequence with 5 terms such that the common difference equals 7 and a0 equals 2.

3, 9, 16, 23, 30

300

Given a standard deck of cards of 54 cards, and you are taking cards out randomly, how many cards do you need to take out to ensure you have a card of each rank?

51

300

Name 5 provinces in China.

1000

99+169-(12+31)-69+69-225

0

1000

69 * 42 * 2024

5865552

1000

What is the minimal number of moves needed to solve a 6-tiered Tower of Hanoi.

63 moves

1000

There are 5 friends shaking hands with each other. is it possible for each person to shake hands a distinct number of times?

No.

1000

When was the Invasion of Poland during WW2?

September 1st, 1939.