Practice No. System Questions and Answers

• Sum of two digits of a two digit number is 11. When digits of the number are reversed then number formed is 45 more than the original number. Find the orig...
• What is the unit digit of the sum of first 111 whole numbers?
• How many 100 digit positive numbers are there?
• What is the unit digit of (217)413 × (819)547 × (414)624 × (342)812?
• N is the largest two digit number, which when divided by 3, 4 and 6 leaves the remainder 1, 2 and 4 respectively. What is the remainder when N is divided b...
• A and B are positive integers. If A + B + AB = 65, then what is the difference between A and B (A, B ≤ 15)?
• If the 5-digit number 535ab is divisible by 3, 7 and 11, then what is the value of (a²-b² + ab)?
• When 1062, 1134 and 1182 are divided by the greatest number x, the remainder in each case is y. What is the value of (x – y) ?
• Two positive numbers differ by 1280. When the greater number is divided by the smaller number, the quotient is 7 and the remainder is 50. The greater numbe...
• The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller numb...
• Let p be a prime number. Then √p is:
• If the numerator of a fraction is increased by 200% and the denominator is increased by 400%, the resultant fraction is 9/25 . What was the original fracti...
• In a division sum, the divisor is 12 times the quotient and 4 times the remainder. If the remainder is 72, the dividend is?
• If the number 985212m8 is completely divisible by 11, then the smallest whole number in place of ‘m’ would be:
• 325 mangoes are distributed among some boys and girls who are 60 in numbers. Each boys gets five mangoes and each girls gets six. The number of boys is :
• Find the digit which will come at the unit place after solving the following expression (769 × 394 × 942)
• What is the average of all the prime numbers which are less than 35?
• The numerator of a fraction is 2 less than its denominator. If the numerator is decreased by 2 and the denominator is increased by 3, the denominator becom...
• A man spends 1/7 of his income on food, 3/5 of his income house rent and 1/4 of his income on clothes. If he still has Rs. 200 left with him, his income is...
• What is the average of all the prime numbers which are less than 35?
• If the 5-digit number 676pq is divisible by 3, 7 and 11, then what is the value of (6p – 7q)?
• Sum of all positive integers from 1 to 100 is
• Which of the following is a Prime Number?
• a, b and c are three integers. The sum of a and b is 61. If b is divided by a then the quotient is 2 and the remainder is 7. If cn - 2 is largest negative ...
• Anil and Ashish receive Rs.1500 for work of 6 days. If Anil is 4 times efficient than Ashish, then find the daily wage received by Ashish.
• Find the average of first 7 whole numbers.
• Find the average of first 11 whole numbers.
• Find the average of first 17 whole numbers.
• Find the average of first 14 whole numbers.
• Find the average of first 12 whole numbers.
• Find the average of first 16 whole numbers.
• Find the average of first 19 whole numbers.
• Find the average of first 20 whole numbers.
• Find the average of first 21 whole numbers.
• Find the average of first 23 whole numbers.
• Find the average of first 24 whole numbers.
• Find the average of first 25 whole numbers.
• Find the median of 5, 6, 10, 7, 7, 8, 6, 5 and 12.
• Find the median of 2, 4, 6, 6, 7, 9, 14, 12 and 13.
• Find the median of 2, 8, 6, 6, 7, 9, 5, 12 and 13.