Riddles
I am an odd number. Take away one letter and I become even. What number am I?
Answer:
Seven (take away the ‘s’ and it becomes ‘even’).
Find the odd man out.
2, 5, 10, 17, 26, 37, 50, 64
Answer: D) 64
Explanation:
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1
64 is out of pattern.
These numbers cannot be expressed as a quotient of 2 integers
Irrational Numbers
To convert kilograms into grams multiple by this
1000
Mathematics branch dealing with angles and functions of triangles
Trigonometry
There is a basket containing 5 apples, how do you divide the apples among 5 children so that each child has 1 apple while 1 apple remains in the basket?
Answer:
4 children get 1 apple each while the fifth child gets the basket with the remaining apple still in it.
There is a three-digit number. The second digit is four times as big as the third digit, while the first digit is three less than the second digit. What is the number?
Answer: 141
In math you find the difference by subtracting the subtrahend from this
Minuend
In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
Answer: 2/7
This branch of Mathematics uses letters to symbolize numbers in equations.
Algebra
How to get a number 100 by using four sevens (7’s) and a one (1)?
Answer 1: 177 – 77 = 100 ;
Answer 2: (7+7) * (7 + (1/7)) = 100
Two girls were born to the same mother, at the same time, on the same day, in the same month and the same year and yet somehow they’re not twins. Why not?
Answer:
Because there was a third girl, which makes them triplets!
Today is Monday. After 61 days, it will be :
Saturday
Each day of the week is repeated after 7 days. So, after 63 days, it will be Monday.
What is 1.92÷3
Answer: 0.64
The mathematics of points, lines and curves
Geometry
Riddle: When John was six years old he hammered a nail into his favorite tree to mark his height. Ten years later at age sixteen, John returned to see how much higher the nail was. If the tree grew by five centimeters each year, how much higher would the nail be?
Answer: The nail would be at the same height since trees grow at their tops.
A ship anchored in a port has a ladder which hangs over the side. The length of the ladder is 200cm, the distance between each rung in 20cm and the bottom rung touches the water. The tide rises at a rate of 10cm an hour. When will the water reach the fifth rung?
Answer: The tide raises both the water and the boat so the water will never reach the fifth rung.
A three dimensional geometric body with a surface that's equidistant from its center at all points
Sphere
In a mythical land 1/2 of 5 = 3. If the same proportion holds, what is the value of 1/3 of 10?
Answer: 5
The branch of mathematics that deals with chances
Probability and Statistics
Riddle: Tom weighs half as much as Peter and Jerry weigh three times the weight of Tom. Their total weight is 720 pounds. Can you figure out the individual weights of each man?
Answer: Tom weighs 120, Peter weighs 240, and Jerry weighs 360.
A monkey is trying to climb a coconut tree. He takes 3 steps forward and slips back 2 steps downward. Each forward step is 30 cm and each backward step is 40 cm. How many steps are required to climb a 100 cm tree?
Answer: 50 steps.
Find the odd man out.
41, 43, 47, 53, 61, 71, 73, 81
Answer: 81
81 is the only number not a prime number
What is the average of first 150 natural numbers?
Answer 75.5
The oldest branch of mathematics that deals with basic operations
Numbers/ Arithmetic