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Number Theory
Decimals
Percents
Fractions
Geometry
100
It has exactly 2 factors, 1 and itself! Example 19; its factors are: 1 & 19!
What is a PRIME number
100
The sum is 1.885.
What is the sum of 1.055 + 0.83
100
It is 4/5 = 0.8 * 100 = 80%.
What is 'four-fifths' as a percent?
100
22/16 which is 1 3/8.
What is 1/2 + 7/8?
100
It is 180 degrees!
What is the sum of the angles in triangles?
200
1,2,3,4,6,9,12,18,36
What are all the factors for 36?
200
It is $422.83.
What is $451.17 - $28.34?
200
It is 0.60 * 80 = 48. Or--- It is 60/100 * 80/1= 3/5 * 80/1 = 240/5 = 48.
What is 60 percent of 80?
200
15/24 - 8/24 = 7/24.
What is 5/8 - 1/3?
200
It has all sides and all angles of exact lengths. Examples are equilateral triangle, square, regular hexagon.
What is a regular polygon?
300
Check the last 2 digits. Example: 744 44/4= 11 Yes, 744 is divisible by 4!
What is the divisibility rule for 4?
300
The estimate is 20 * 10= 200!
What is the magnitude estimate of the product of "21.88 times 9.78?"
300
It is calculated as 0.4 * 28. So, the discount amount is $11.20.
What is the discount for the $28 item that is 40 percent off?
300
It is 3 1/7.
What is 22/7 as a mixed number?
300
Angles in intersecting lines directly opposite, or across from one another. are opposite angles.
What is an opposite angle?
400
It is 3*3*3*3 = 81
What is "3 to the power of 4?"
400
64.7 is the quotient.
What is the quotient of '25.88 divided by 0.4?'
400
0.4 * 28= $11.20 discount. So, the sale price is $28 - $11.20 = $16.80.
What is the sale price for a $28 item that is 40% off?
400
It is 4 18/21 + 2 7/21 = 6 25/21; 6 + 1 4/21 = 7 4/21. The sum is 7 4/21.
What is 4 6/11 + 2 1/3?
400
It is the sum of two angles that measure 90 degrees.
What are complementary angles?
500
" 9 * 6= 54." Those are 2 factors, but NOT prime factors. Then, 9 = 3 *3. And 6 = 2 * 3. Therefore, 2*3*3*3 is the prime factorization for 54!
What is the prime factorization for 54?
500
0.625
What is 'five-eighths' as a decimal?
500
It is 320%!
What is 3.2 as a percent?
500
It is 13 6/15 - 6 14/15. You must borrow! 12 21/15 - 6 7/15 = 6 14/15. The difference is 6 14/15.
What is 13 2/5 - 6 7/15?
500
Theformula is P=2l + 2w. It is P= 2*24 + 2*16 = 48 + 32= 80. So, the Perimeter = 80 feet.
What is the perimeter of a rectangular garden that has a length of 24 feet and a width of 16 feet?