Number System, Problems on Number

What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30?

The next number in the sequence 1, 2, 3, 5, 8, 13, 21, ____ is-

If a = 0.67 then which one of the following is smaller than a?

The ratio of two numbers is 3 : 4 and their L.C.M is 84, find the number- 

If x = 10, which of the following has the minimum value?

The average of a natural number and its cube is 13 times the number. The number is-

Divide 60 by half and deduct twenty. What do you get?

Three boys agree to divide a bag of marbles in the following manner. The first boy takes one more than half the marbles. The second takes a third of the number remaining. The third boy finds that he is left with twice as many marbles as the second boy. The original number of marbles is -

28√? + 1,426 = 3/4 of 2,872

Which number is divisible by 2, 3, 4 and 6 but is not divisible by 5?

A car manufacturer has 2,992 forklifts, which is approximately one forklift for every 48.9 employees. Which of the following is the closest approximation in thousands, of the number of employees employed by the manufacturer?

০.৩৫ কে ভগ্নাংশে প্রকাশ করলে কত হবে?

Two numbers are in the ratio 5:4 and their difference is 10. What is the smallest number?

A two-digit number has 3 in its unit digit. The sum of its digits is one seventh of the number itself. What is the number?

A jar contains red balls and green balls in the ratio 3 : 1. If the jar contains only the two types of balls, which of the following cannot be the number of balls in the jar?

When 4 is added to 1/2 of a number, the result is 14. What is the number?

If you divide 30 by half and add 10 with the resulting figure, then what is the final result?

When 17 is divided by k, where K is a positive integer less than 17, the remainder is 3. What is the remainder when the sum of possible values of it is divided by 17?

Two number are in the ratio 3 : 5. If 9 is subtracted from each, the new numbers are in the ratio 12 : 23. The smaller number is

If 6.4 is 80 percent of 20 percent of a certain number, what is the number?