Problems on Numbers Questions

• If A = 11x2+11x4+12x3+14x7+13x4+17x10... upto 20 terms, then what is the value of A?
• What is the sum of all natural numbers between 100 and 400 which are divisible by 13?
• If the least common multiple of two numbers, 1728 and K is 5184, then how many values of K are possible?
• When a number is increased by 20, it becomes 116% of itself. What is the number?
• Two numbers are 50% and 75% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number?
• How many 3 digit numbers are completely divided by 4.
• The sum of the digits of a 2digit number is 17. If we add 9 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.
• A number is greater than five times its reciprocal by 19/2. Find the number.
• Find 2 consecutive natural numbers, sum of whose squares is 25.
• Product of digits of a 2-digit number is 24. If we add 45 to the number, the new number obtained is a number formed by interchange of the digits.What is the original number?
• Divide 32 into two parts such that the sum of the square of the parts is 674. What is the value of the parts?
• On dividing a number by 47, we get 75 as quotient and 18 as remainder. What is the number?
• The reciprocal of the sum of the reciprocals of 3/8 and 8/11 is:
• The reciprocal of the sum of the reciprocals of 8/7 and 5/6 is:
• The first and last terms of an arithmetic progression are 23 and 42. What is the sum of the series if it has 14 terms?
• Convert decimal number 101 to binary.
• What is the unit digit of the sum of first 111 whole numbers?
• How many 100 digit positive number are there?
• What is the unit digit of (217)413 × (819)547 × (414)624 × (342)812?