Pure Arithmetic
12345+6789=?
19134
What is the only even prime number?
2
What are the next 2 numbers in this geometric sequence. 3, 6, 12, ...
24, 48
Is 51 a prime number?
No
A library had 3,250 books. They bought 425 new books and later donated 600 books to another school. How many books does the library have now?
3075 books
7,501 − 2,886 =?
4,615
What is the only number that cannot be written in Roman numerals?
0
What is the 6th number of this sequence. 5, 10, 20, ...
160
Is 149 a prime number?
Yes.
A pizza is cut into 8 slices. If someone eats 3 slices, what fraction of the pizza is left?
5/8
4,325 + 2,786 − 1,493 = ?
5,618
Name as many digits of Pi as you can. Team who can name the most accurate wins.
3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 8214808651 3282306647 0938446095 5058223172 5359408128 4811174502 8410270193 8521105559 6446229489 5493038196 4428810975 6659334461 2847564823 3786783165 2712019091 4564856692 3460348610 4543266482
What is the sum of the next 3 numbers of this geometric sequence. 4, 12, 36, ...
108 + 324 + 972 = 1,404
Find the next prime number after 79.
83
A garden has 381 plants, and 2/3 of them are roses. How many roses are there?
254 roses
24 × 15 x 17=?
6120
What British mathematician used his skills to crack the “unbreakable” German Enigma code during World War II, saving millions of lives?
Alan Turing
A geometric sequence has the first term 8 and 4th term 64. What is the common ratio?
2
What is the first prime number over 1000?
1009
A rope is 18 meters long. It is cut into pieces that are each 3/4 meter long. How many pieces are made?
24 pieces
-14 + 16 x 18 ÷ 9 + 21
39
March 14th is celebrated globally as Pi Day, which also coincidentally happens to be the birthday of what famous physicist?
Albert Einstein
A magician quintiples (multiplies by 5) the number of coins he has every day. On the first day he has 5 coins. How many coins will he have on the 6th day.
15,625 coins.
Find the sum of the prime numbers between 20 and 40.
120
A school library has 3,249 books. They plan to organize them into shelves, with 25 books on each shelf. How many full shelves will the library fill? How many will be left over?