Number System, Problems on Number

The face value of 8 in the number 458926 is-

How many integers from 1 to 1000 are divisible by 30 but not by 16?

A rectangular plot measuring 90 meters by 50 meters is to be enclosed by wire fencing. If the poles of the fence are kept 5 meters apart, how many poles will be needed?

Three numbers are added in pairs, the sums so obtained are 20, 27 and 23. What are those three numbers?

A number consists of 3 digits whose sum is 10. The middle digit is equal to the sum of the other two and the number will be increased by 99 if its digits are reversed. What is the number?

40 is subtracted from 60% of a number, the result is 50. Find the number?

If x is an integer, then which of the following statements about x² - x - 1 is true?

A number when divided by 627 leaves a remainder 43. By dividing the same number by 19 , the remainder will be__

If a and b are positive real numbers, then (a⁰ - 3b⁰)⁵ =

(√7 + √7)² =

A student loses 1 mark for every wrong answer and scores 2 marks for every correct answer. If he answers all the 60 questions in an exam and scores 39 marks, how many of them were correct?

Which of the following is greater than 1?

For which of the following values of x is (x + 78)/x an integer?

A car go 33 miles per gallon using gasoline that cost $2.95 per gallon. Approximately what was the cost, in dollars, of the gasoline used in driving the car 350 miles ?

Which one is the smallest?

In a group of 52 persons, 16 drink tea but not coffee, and 33 drink tea. How many drink coffee but not tea?

Two-fifth of one-third of three-seventh of a number is 15. What is 40 percent of that number?

The LCM and HCF of two numbers are 90 and 15 respectively. If one number is 45, the other number is -

The least number by which 294 must be multiplied to make it a perfect square is :

There are 8 more men than women on board of directors of a company. If there are 20 members on the board, how many are men?