WorksheetsMATH AND SCIENCE WHIZ
Total questions: 55
Worksheet time: 56mins
The word "Arithmetic" comes from what ancient Greek word?
Arithmētikē
Arithmos
Arithmatiká
Arithēma
Find the result when 3 hrs and 47 mins is subtracted from 6 hrs and 10 mins.
2 hrs and 23 mins
2 hrs and 37 mins
3 hrs and 23 mins
3 hrs and 37 mins
If each fraction in the set {4/n, 6/n, 7/n} is in its simplest reduced form, which of the following could be the value of n?
17
15
12
9
The number that is 18 less than 94 is 19 times _____.
4
2
6
8
Find half the difference between 7 1/8 and 4 5/7.
*The given numbers are not improper fractions.
1 23/112
1 35/112
2 23/56
2 23/112
For which d is the remainder largest when the number 57,395,340 is divided by d?
8
9
6
4
If a= -2, b= 3, and c= 4, what is the value of (c - 2a²b)³?
-8,000
8,000
600
-400
The perimeter of an isosceles triangle is 68 cm. How many of such triangles can be formed if the lengths of the sides are integers?
16
2
33
68
Find a number which is 237 more than the product of 306 and 407.
124,779
221,001
124,879
197,064
What is 125% of 40?
50
0.5
5
500
Which of the equations given is correct?
216 = 2³ x 3³
45 = 3 x 5 x 7
2⁷ = 3⁴
30 = 2² x 7
The total number of points in an entrance exam was 350. Minyang obtained 86% of it. How many points did Minyang obtain?
301
178
167
197
If Torren saves 15% of his salary, what percent of his earnings does he spend?
85%
80%
50%
75%
Which is a composite number?
39
67
41
47
What is the average of 92, 85, 91, 89, and 93?
90
86
88
87.6
Most earthquakes occur in _____.
plate boundaries
oceans
large towns
plateau
Sunspots are _____.
cooler than the rest of the surface
made of liquids
hotter than the rest of the surface
made of carbon
What do you call an animal that feeds on birds, rabbits, mice, or on any other secondary consumer?
Tertiary consumer
Primary consumer
Scavenger
Decomposer
One of the following is a practical use of silicon.
For making computer chips
As conductor of heat
As insulator for electric irons
Making porcelains and glazes for pottery
Which of the following is NOT a metal?
Iodine (I)
Nickel (Ni)
Silver (Ag)
Gold (Au)
Sodium hydroxide (NaOH) is an example of a/an _____.
base
salt
element
acid
One of the following is NOT an acid.
H₂O
HCl
HNO₃
CH₃COOH
A magnifying lens contains _____ which tends to make the objects appear larger.
convex lens
concave lens
both of the lenses
none of the lenses
Why does copper sink in water while oak wood floats?
An object with higher density than water sinks while an object with lower density than water floats
Copper is heavier than oak wood
Oak wood is lighter than copper
An object with a lower density than water sinks while an object with higher density than water floats
The series of wave-like muscular movements which moves the food down the alimentary canal is known as _____.
peristalsis
mastication
digestion
churning
The atmosphere consists of gases, but four (4) of them are the most important.
Oxygen (O), carbon dioxide (CO₂), nitrogen (N), and argon (Ar)
Carbon dioxide (CO₂), hydrogen (H), oxygen (O), and carbon (C)
Oxygen (O), hydrogen (H), helium (He), and nitrogen (N)
Oxygen (O), nitrogen (N), argon (Ar), and water vapor
The amount of blood is around _____ of a person's body weight.
2/25
1/50
1/40
4/5
What power in watts is employed in lifting a 5-kg mass to a height of 2 m in 7 secs?
14
1.4
1.75
17.5
When cut and removed from the body and placed in a suitable saline solution, the heart can be observed to continually beat. Which best explains this observation?
There is a natural pacemaker in the heart that initiates heart beat
The saline solutions keeps the heart beating
The beating of the heart is under the control of the organism
The heart is multinucleated such that there are many points of regulating heart beat
A certain fossil was found to contain only 12.5% of radioactive Carbon-14. If the half-life of Carbon-14 is 5,730 years, how old is the fossil?
17,190 years old
45,840 years old
11,460 years old
5,014 years old
What is the value of: 1 - 4 + 9 - 16 + 25 - 36 + 49 - 64 + 81 - 100?
(a)
Find the value of n: 3² x 9² x 27² x 81² = 3ⁿ
(a)
Choose a number. Double that number. Add 400. Triple the result. Divide by 5. Subtract 120% of the original number. What is the value of the result?
(a)
The ratio of two numbers is 7:4. If 8 is subtracted from the larger and 3 from the smaller, the new ratio will be 5:3. Find the smaller of the original numbers.
(a)
If y = 2x³ + 12, find the value of y when x = 3.
(a)
Count the number of gifts received in the song, "Twelve Days of Christmas."
*Input the number only.
(a)
One way of effectively killing a tree is to cut a ring of bark around the trunk of the tree. This method essentially affects the function of what tissue?
(a)
How many significant figures are there in 1.00100?
*Input the word form of the number.
(a)
If the chromosome number of your skin is 46, the number of chromosomes in your gametes is (a) .
*Input in numerical form.
A scientist may guess at a possible explanation of what he sees. This possible explanation is a (a) .
Everytime we breathe in, we use up (a) .
*Input the complete word.
This is the process by which the body cells take in oxygen and give off carbon dioxide.
(a)
A general type of drug that slows down the nervous system.
(a)
How many possible outcomes are there if three six-sided dice are tossed?
(a)
This is a type of soil that contains a mixture of sand, silt, clay, and humus.
*Don't include the word "soil."
(a)
The average weight of 125 children sitting on a boat is 45kg. If one of them gets out of the boat, the average weight of the remaining children is 44.75 kg. Find the weight of the child who got out of the boat.
*Input the number only.
(a)
Raegan and Minda are getting married. Bree, Minda's best friend, offered to take care of the 12-layer wedding cake. The first layer will be 12 inches high, the second layer 11, the third 10, and so on. How high will the cake be?
*Include inputting the measuring unit, in its complete word.
(a)
Acceleration is the change of velocity over a given time. A car has an acceleration of 1 m/s². What is the change in its velocity after every 3 secs?
*Include inputting the appropriate measuring unit.
(a)
In a certain pond, 80 fish were caught, tagged, and returned to the pond. A few days later, 80 fish were caught again, of which 4 were found to have been tagged. If the fractional part of the tagged fish in the second catch approximates the fractional part of tagged fish in the pond, what is the approximate number of fish in the pond?
*Input the number only.
(a)
A square floor with sides of 4 meters is to be completely covered with non-overlapping 40 cm by 40 cm square tiles. If every tile along the outer edge of the floor is blue and all the other tiles are white, how many blue tiles are needed?
*Express the answer with completeness.
(a)
A water tank can be filled by an inlet pipe in 3 hrs and can be drained by an outlet pipe in 6 hrs. How long will it take to fill an empty tank, if by mistake both pipes were opened at the same time?
*Express the answer with completeness and in complete form of the measuring unit.
(a)
A driver covered 480 km in 8 hrs. Before noon, he averaged 80 kph, but in the afternoon, he averaged only 40 kph. At what time did he leave?
*Express answer with completeness.
(a)
A larger box is 33 1/3% longer, 25% wider, and 20% taller than a smaller box. The volume of the smaller box is what percent of the volume of the larger box?
*Input with proper symbol.
(a)
Erabeth is now four times as old as Amelia. Five years ago, the sum of their ages was 45 years. How old will Erabeth be in 5 years?
*Input the number only.
(a)
One gallon of water is equal to 231 cubic inches. Find the number of gallons needed to fill a rectangular tank "6" by "14" by "22."
*Input the number only.
(a)
