N is a natural number greater than 1. When 1 is added to N the result is a multiple of 2. When 2 is added to N, the result is a multiple of 3. When 3 is added to N, the result is a multiple of 4. When 4 is added to N the result is a multiple of 5. When 5 is added to N the result is a multiple of 6. When 6 is added to N the result is a multiple of 7.
Question 1:
The smallest multiple of 47 is
Question 2:
Which of following numbers is prime?
Answer:
Question 3:
The smallest factor of 82 is
Question 4:
K is a prime number and a multiple of 43. What is K?
Answer: K =
Question 5:
In the following figure, AN = 5cm and AB = 8cm. NB = cm
Question 6:
In the following figure, RQ = 12cm and PR = 17cm. PQ = cm
Question 7:
List the first three multiple of 6.
(Write numbers in order from least to greatest and use “;”)
Answer:
Question 8:
The number 55 has factors.
Question 9:
Find n such that n and n + 1 are factors of 40
Answer: n =
Question 10:
If a, b are consecutive natural numbers and is divisible by 5 and 9 then a =
a whole number n is subtracted from the numerator of 41/55. At the same time, m is added to its denominator and the fraction now becomes 3/5 in its simplest form
Factorial n! means the product of the first integers from 1 to n. What is the least positive integer n such that n! is a multiple of 2015*2016?
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Question 1:
K is a prime number and a multiple of 43. What is K?
Answer: K =
Question 2:
Which of following numbers is prime?
Answer:
Question 3:
Which of following numbers is composite?
Answer: .
Question 4:
The smallest odd multiple of 9 is
Question 5:
The number 55 has factors.
Question 6:
In the following figure, AN = 5cm and AB = 8cm. NB = cm
Question 7:
Find the sum of all the factors of 19
Answer:
Question 8:
In the following numbers, which has the most factors?
Answer:
Question 9:
How many numbers from 1 to 500 are multiple of 6?
Answer:
Question 10:
The largest possible whole number that is less than 120 and has only 2 and 5 as prime factors is
Question 1:
P is a prime number and a factor of 8. What is P?
Answer: P =
Question 2:
The greatest even factor of 62 is
Question 3:
The smallest multiple of 47 is
Question 4:
K is a prime number and a multiple of 43. What is K?
Answer: K =
Question 5:
The number 55 has factors.
Question 6:
In the following numbers, which has the most factors?
Answer:
Question 7:
In the following figure, AN = 5cm and AB = 8cm. NB = cm
Question 8:
Find the sum of all the factors of 19
Answer:
Question 9:
Find such that .
Answer: .
Question 10:
Find n such that n and n + 1 are factors of 40
Answer: n =
Question 1:
The least common multiple of 330; 65; 15 is
Question 2:
Given seven numbers: 25; 17; 39; 43; 239; 1021; 1023.
The composite numbers are
(Write numbers in order from the least to the greatest and use ";")
Question 3:
The common factors of 18 and 27 are
(Write numbers in order from the least to the greatest and use ";")
Question 4:
Given the set of even numbers: {2; 4; 6; …; 100}.The number of elements is
Question 5:
Find four integer numbers a,b,c,d such that
a + b + c + d = 1
a + c + d = 2
a + b + d = 3
a + b + c = 4
Answer: (a;b;c;d)=()
Question 6:
Find a four-digit natural number that is less than 2015.If the thousands digit is erased,the number will be decreased by 9 times.
Answer:The number is
Question 7:
Calculate: 1×2+2×3+⋯+100×101=
Question 8:
The term of the expression A=1-7+13-19+25-31+⋯ is
Question 9:
Given the expression A= ...
Find the value of n such that 2A+3=
Answer: n=
Question 10:
A natural number has six digits and the units digit is 4.If the units digit is moved to the first row then the number will be increasedby 4 times.The number is
Question 1:
The smallest odd multiple of 9 is
Question 2:
K is a prime number and a multiple of 43. What is K?
Answer: K =
Question 3:
How many prime numbers are less than 10?
Answer: There are numbers.
Question 4:
P is a prime number and a factor of 8. What is P?
Answer: P =
Question 5:
A prime number between 42 and 46 is
Question 6:
In the following numbers, which has the most factors?
Answer:
Question 7:
The number 55 has factors.
Question 8:
Find the sum of all the factors of 15
Answer:
Question 9:
How many times does the digit “0” appear in numbers from 1 to 1000?
Answer:
Question 10:
If m, n are consecutive odd numbers and is divisible by 3 and 5 then m =
What is the largest integer n such that there is a multiple of 4 less than n2 but greater than n2+\(\frac{2016}{n^2}\)?
Question 1:
J is a factor and a multiple of 25. What is J?
Answer: J =
Question 2:
How many prime numbers are less than 10?
Answer: There are numbers.
Question 3:
The greatest even factor of 62 is
Question 4:
The smallest multiple of 47 is
Question 5:
Find the sum of all the factors of 19
Answer:
Question 6:
A prime number between 42 and 46 is
Question 7:
The number 55 has factors.
Question 8:
In the following figure, AN = 5cm and AB = 8cm. NB = cm
Question 9:
If m, n are consecutive odd numbers and is divisible by 3 and 5 then m =
Question 10:
The largest possible whole number that is less than 120 and has only 2 and 5 as prime factors is
