The sum of the first 50 natural numbers is:
The sum of the first 50 natural numbers is:
If a number is divisible by 9 and 10, it must be divisible by:
If a number is divisible by 9 and 10, it must be divisible by:
A number is divisible by 11 if:
A number is divisible by 11 if:
Which of the following is a perfect square?
Which of the following is a perfect square?
The remainder when 232323^{23}2323 is divided by 7 is:
The remainder when 232323^{23}2323 is divided by 7 is:
The number of prime numbers less than 100 is:
The number of prime numbers less than 100 is:
The least number which when divided by 12, 16, 20 and 24 leaves a remainder 4 in each case is:
The least number which when divided by 12, 16, 20 and 24 leaves a remainder 4 in each case is:
A two-digit number is 4 times the sum of its digits. If 18 is added, the digits interchange. Find the number.
A two-digit number is 4 times the sum of its digits. If 18 is added, the digits interchange. Find the number.
The smallest prime number greater than 100 is:
The smallest prime number greater than 100 is:
Which of the following numbers is divisible by both 8 and 12?
Which of the following numbers is divisible by both 8 and 12?
The smallest 5-digit number divisible by 12, 15 and 18 is:
The smallest 5-digit number divisible by 12, 15 and 18 is:
The remainder when 414141^{41}4141 is divided by 5 is:
The remainder when 414141^{41}4141 is divided by 5 is:
The number of integers between 1 and 1000 divisible by neither 2, 3 nor 5 is:
The number of integers between 1 and 1000 divisible by neither 2, 3 nor 5 is:
How many numbers between 1 and 1000 are divisible by 7 but not divisible by 3?
How many numbers between 1 and 1000 are divisible by 7 but not divisible by 3?
If the LCM of two numbers is 168 and HCF is 12, then the product of the two numbers is:
If the LCM of two numbers is 168 and HCF is 12, then the product of the two numbers is:
The product of two consecutive odd numbers is always:
The product of two consecutive odd numbers is always:
Which of the following is not an integer?
Which of the following is not an integer?
The HCF of 2.1, 0.63 and 0.105 is:
The HCF of 2.1, 0.63 and 0.105 is:
The unit digit of 172317^{23}1723 is:
The unit digit of 172317^{23}1723 is:
The sum of digits of a two-digit number is 9. If 27 is subtracted from it, digits are reversed. Find the number.
The sum of digits of a two-digit number is 9. If 27 is subtracted from it, digits are reversed. Find the number.
The largest 4-digit number exactly divisible by 88 is:
The largest 4-digit number exactly divisible by 88 is:
If the sum of two numbers is 84 and their HCF is 12, then the number of such pairs is:
If the sum of two numbers is 84 and their HCF is 12, then the number of such pairs is:
The sum of the digits in the number 10100−110^{100} - 110100−1 is:
The sum of the digits in the number 10100−110^{100} - 110100−1 is:
The LCM of two numbers is 180 and their HCF is 15. If one number is 45, the other is:
The LCM of two numbers is 180 and their HCF is 15. If one number is 45, the other is:
The last two digits of 1725617^{256}17256 are:
The last two digits of 1725617^{256}17256 are:
The number of factors of 840 which are perfect squares is:
The number of factors of 840 which are perfect squares is:
The number of factors of 1080 is:
The number of factors of 1080 is:
The least number which when divided by 35, 45 and 55 leaves the same remainder is:
The least number which when divided by 35, 45 and 55 leaves the same remainder is:
Find the number of zeros in 50!50!50!.
Find the number of zeros in 50!50!50!.
The sum of first 20 odd numbers is:
The sum of first 20 odd numbers is: