Number System, Problems on Number

0.3 × 0.6 = কত?

A man deposits certain amount in his bank account. After a few days. he withdraws half of the money deposited and deposits Tk. 500 more. If he has a balance of Tk. 2000 in his bank account, find the amount deposited initially.

How many multiples of 7 are there between 100 and 150?

If an investment of P dollars is made today and the value of the investment doubles every 7 years, what will be the value of the investment, in dollars 28 years from today?

If the product of two numbers is 560 and greatest common factor is 4. Then what is the least common multiple?

5a² - 4a - 3 - 3 (a² + a + 4) = 0. What is the sum of possible value of a?

a, b and c are positive integers. If b equals the square root of a and if c equals the sum of a and b, which of the following could be the value of c?

If f(a) = a - 5 and g(b)= 5 − b, what is the value of the expression ।f(x)।− ।g(x)। + ।f[g(x)]।?

What is the difference between the sixth and the fifth terms of the sequence 2, 4, 7, ____ whose n^th term is n + 2^{(n - 1)}?

One third of Aman's marks in Mathematics exceeds a half of his marks in English by 30. If he got 240 marks in the two subjects together, how many marks did he get in English?

If the product of 3 different positive integers is 6, then twice the sum of the integers is:

What is the value of the expression 1/{1+1/(1+1/4)}?

The ratio between two numbers is 3:4 and their sum is 420. The greater one of the two numbers is-

The average of a non-zero number and its square is 5 times the number. The number is-

Which of the following fractions is the largest?

85% of a number is added to 24, the result is the same number. Find the number?

After fillings the car's fuel tank, a driver drove from P to Q and then to R. He used (2/5)th portion of the fuel driving from P to Q. If she used another 7 liters to drive from Q to R and still had (1/4)th of the tank left, how many liters does the tank hold?

The greatest number which can divide 1356, 1868 and 2764, leaving the same remainder 12 in each case, is:

How many 3-digit numbers are completely divisible by 6?

The number of m yields a remainder p when divided by 14 and a remainder q when divided by 7, if p = q + 7, the which one of the following could be the value of m?