Theory
How many centimeters are there in one meter?
100cm
A survey showed that of 100 high school students, 50 of them took biology, 20 took chemistry, and 12 took both. How many of the 100 students took neither biology nor chemistry?
42 students
I am hot.
I live in the sky.
I am bright.
Don't look straight at me.
I disappear in the night.
How many zeros does a thousand million have?
9 zeros
If one can of dog food feeds eight pups or six dogs, then eight cans of the same dog food will feed 40 puppies and how many dogs?
18 dogs
I’m usually green and brown. With rain, I can live for a long time. I’m a house for a bird and kids love to climb me. What am I?
A Tree
What is the sum of natural numbers in a pattern formula? Ex; 1+2+3+5...100 =
S= n/2[2a + (n − 1) × d]
The average of three numbers is 40. All three are whole positive numbers and are different from each other. If the lowest is 19, what could be the highest possible number of the remaining two numbers?
81
My body is usually made of brick or wood and I come with a lot of windows and doors. Keep me nice and clean for visitors and I will keep you warm and cozy. You can sell me when your family grows. What am I?
A house
What is the pythagoras theorem?
a2 + b2 = c2
In a bass fishing tournament, 200 bass were caught in 5 days. The total fish caught on each day was 8 more than the day before. How many fish were caught on the first day?
24 fish
I am full of keys, but I cannot open any door. What am I?
A piano
Grace has 4 more $50 notes than $10 notes in her wallet. If the total amount of the notes is $380, how many $10 notes does Grace have?
I come down, but I never go up. What am I?
Rain