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Practice No. System Questions and Answers

Six numbers are arranged in decreasing order. The average of the first five numbers is 40, and the average of the last five numbers is 35. What is the diff...
Nine numbers are arranged in decreasing order. The average of the first eight numbers is 50, and the average of the last eight numbers is 45. What is the d...
Ten numbers are arranged in decreasing order. The average of the first nine numbers is 55, and the average of the last nine numbers is 50. What is the diff...
Five numbers are arranged in decreasing order. The average of the first four numbers is 60, and the average of the last four numbers is 55. What is the dif...
The cost of 3 notebooks and 2 erasers is Rs.47, and the cost of 5 notebooks and 4 erasers is Rs.83. What is the total price (in Rs) of 2 notebooks and 3 er...
Twin prime numbers are the prime numbers whose difference is always equal to 2. The number of twin primes between 35 and 100 is:
Which of the following is a pair of co-primes?
Find the unit digit of the product 127 × 137 × 413 × 291 × 342 × 533 × 342.
What is the digit in the units place of the number (1624)24 ?
Find the unit digit in (257)45 × (248)73.
Find the number of factors in 1750.
Find the number of trailing zeros in 475!
What will be the remainder when 4961 is divided by 35?
A six-digit number 4c68d2 is divisible by 12. Find the sum of all possible values of 'c' for the largest possible value of 'd'.
'M' is the largest three-digit number that leaves 3 as a remainder when divided by 9, 12 and 5, Find the sum of digits of 'M'.
Sandeep can solve 20 questions in 1 hour. If he decreased his efficiency by 20%, then how much time would he take to solve the same number of questions?
Find the remainder when the number (289n + 147) is divided by 17.
The sum of a positive number 'A' and its square is 240. Find the value of (A2 - 7A).
Find the largest three-digit number that leaves '3', '4' and '5' as remainder when it is divided by '7', '8' and '9', respectively.
If '176x95' is a six-digit number that is divisible by 3, then find the maximum value of '5x'.
Find the smallest integer that must be subtracted from 653, so that it is divisible by both 23 and 27.
What is the number of divisors of 360?
What is the place value of 3 in 3678921410. 1. 3 ×104 2. 3 ×107 3. 3 ×105 4. 3 ×109
15% of a number is 1.2. Find that number.
If (3/4)th of a number is subtracted from (5/6)th of that number, then the resultant will be (2/6). Find the number.
The scores of KL Rahul in a T20 series were 78, 34, 56, 90, and 45. While the scores of Rishabh Pant in the same series were 22, 87, 43, 100, and 60, respe...
One-seventh of a 2-digit number is 10 less than half of the number. What is the sum of the digits of the 2-digit number?
Determine the following number which is divisible by 3?
If y = ∛ 6 – 4, then what is the value of y³ + 12y² + 48y + 100?
240 students need to be arranged to sit in 12 rows. If the number of rows increases by 25%, then find the number of students who will now be sitting in eac...
Find the mean proportion of 2.56 and 0.0324.
What is the fourth proportional of √20, √30, and √18?
Find the number of even numbers between 12 and 30.
if the sum of two numbers is 360, and one of the numbers is 50% more than the other number, find the larger number.
Find the fourth proportional of 12, 24, and 30.
Which number must be multiplied with 2352 to transform it into a perfect square?
Which of the following numbers is divisible by 11?
If a number 'x' is increased by 30% and then decreased by 20%, the resultant obtained is 416, then find the value of 'x'.
What is the largest three-digit number that, when divided by 11 or 19, leaves a remainder of 4?
What is the smallest four-digit number that can be evenly divided by 20, 24, and 36?

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