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The average of 5 consecutive odd numbers A, B, C, D and E is 55. What is the product of B and D ?

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Important Questions on Number System

MEDIUM
If 59 is added to a square of a number, the result is 900. What is the number?
EASY

The sum of three consecutive numbers is 126. Find the highest number-

1. 41
2. 42
3. 43
4. 44

EASY

1 USD = Rs. 67.89. A money changer adds a margin of Rs. 1.11. What will be the cost of 150 USD ? 

1. Rs. 10,183
2. Rs. 10,350
3. Rs. 10,330
4. Rs. 10,450

EASY
The sum of two digits of a number is 13. If 9 is subtracted from the number, the digits are interchanged. What is the number?
EASY

A is Highest Common factor of 34 and 916

B is Least Common Multiple of 165 and 425

What is the value of A + B?

EASY
If 14 of third-part of number is 5, then the number is:
EASY

Twice the difference between two numbers is equal to their sum. If one number is 15, Find the other number.

1. 15
2. 10
3. 5
4. 20 

EASY
Find the unit place digit in (82)102+(183)103
EASY
In a four-digit number, the product of thousands digit and units digit is zero while their difference is 7. Product of the middle digits is 18. The thousands digit is as much more than the units digit as the hundreds digit is more than the tens digit. The four-digit number is
HARD
If x is the HCF and y is the LCM of 35,625,920,2750, then which one of the following is correct?
MEDIUM
A student was asked to divide a number by 6 and add 12 to the quotient. He, however, first added 12 to the number and then divided it by 6, getting 112 as the answer. The correct answer should have been _____.
EASY
What is the HCF of 1524,1239 and 4049
MEDIUM
The least number, which is to be added to the greatest number of 4 digits so that the sum may be divisible by 345, is _____.
EASY
The difference of the cubes of two consecutive numbers is 127. What are the numbers?
EASY
Find the number that is different from other options in the given list of numbers.
EASY
The sum of four consecutive odd numbers is 328. Find the largest number.
EASY
1800 chocolates were distributed among the students of a class. Each student got twice as many chocolates as the number of students in the class. Calculate the number of students in the class.
EASY

How many times does the number 3 occur in unit's place for numbers ranging from 1 to 100?

1. 20
2. 11
3. 10
4. 19

MEDIUM
The HCF of  23,89,1027,3281 is.
EASY

Convert 18 into binary number?