Review Questions 1
What number is 60% of 40?
24
What is an equivalent value for 10^–6?
0.000001
Melvin ate 1/6 of the 42 fudge brownies. How many brownies did he eat?
7
Simplify: 7 yd 2 ft 11 in.
- 9 in.
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7 yd 2 ft 2 in.
Big Al the ape ate 100 delicious yellow bananas from May 1 through May 5. Each day he ate six more bananas than on the previous day. How many delicious bananas did Big Al eat on May 5?
32
Roderick ate 1/6 of the 30 fudge brownies. How many brownies did he eat?
5
Simplify: 6 yd 1 ft 5 in.
- 11 in.
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6 yd 6 in.
What is -1 + 7?
6
After taking 7 quizzes, your average is 76 out of 100. What must your average be on the next five quizzes to increase your average to 81?
88
The Little Twelve Basketball League has two divisions, with six teams in each division. Each team plays each of the other teams in its own division twice and every team in the other division once. How many games are scheduled?
96
What is 4 + -1?
3
After taking 7 quizzes, your average is 75 out of 100. What must your average be on the next five quizzes to increase your average to 80?
87
How many lines of symmetry does a circle have?
infinite
The ratio of employees to computers in a certain company is 13 to 3. If there are 91 employees in the company, how many computers are there?
21
How many different isosceles triangles have integer side lengths and perimeter 23?
6
How many lines of symmetry does a triangle have?
3
The ratio of employees to computers in a certain company is 12 to 2. If there are 8 computers in the company, how many employees are there?
48
Which is 0.0000534 written in scientific notation?
5.34 x10^-5
Joe had walked half way from home to school when he realized he was late. He ran the rest of the way to school. He ran 3 times as fast as he walked. Joe took 6 minutes to walk half way to school. How many minutes did it take Joe to get from home to school?
We know that it took Joe 6 minutes to walk halfway. If he ran 3 times as fast as that, he went 6/3 = 2 minutes for the other half. Therefore, we have 6+2 = 8 minutes.
A five-legged Martian has a drawer full of socks, each of which is red, white or blue, and there are at least five socks of each color. The Martian pulls out one sock at a time without looking. How many socks must the Martian remove from the drawer to be certain there will be 5 socks of the same color?
13
Which is 0.000235 written in scientific notation?
2.35 x10^-4
What number is 32% of 700?
224
What is an equivalent value for 10^–5 ?
0.00001
The sales tax rate in Bergville is 6%. During a sale at the Bergville Coat Closet, the price of a coat is discounted 20% from its $90.00 price. Two clerks, Jack and Jill, calculate the bill independently. Jack brings up $90.00 and adds 6% sales tax, then subtracts 20% from this total. Jill rings up $90.00, subtracts 20% of the price, then adds 6% of the discounted price for sales tax. What is Jack's total minus Jill's total?
The price Jack rings up is 90 x1.06x0.80. The price Jill rings up is 90 x 0.8 x1.06. By the commutative property of multiplication, these quantities are the same, and the difference is 0.
How many three-digit numbers are divisible by 13?
69