If x=y=2z and xyz= 256, then x = ?

One-third of Ratan's investment in National Savings Certificate is equal to one-half of his investment in FDR. If he has Tk. 1,50,000 as total investment, how much he invested in savings certificate?

A man bought some eggs of which 10% are rotten. He gives 80% of the remainder to his neighbors. Now he is left out with 36 eggs. How many eggs he bought?

The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is –

The sum of the ages of the father and son is 80 years. If ten years ago the age of father was three times that of his son, find the present age of the son.

The monthly incomes of two persons are in the ratio 4:5 and their monthly expenditures are in the ratio of 7:9. If each saves BDT 50 per month, find their monthly income.

Simple interest on a certain sum at the rate of 4.5% p.a. for 4 years and 6 years differs by BDT 216. The sum is-

If the product of three consecutive integers is 210, then the sum of integers is .

In a right triangle, the length of one of the legs is 3 and the length of the hypotenuse is 5. What is the length of the other leg?

If x = a + $\frac{1}{a}$ and y = a –$\frac{1}{a}$ then x⁴ + y⁴ - 2x²y² = ?

The present ratio of students to teachers at a certain school is 30 to 1. If the student enrollment were to increase by 50 students and the number of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?

A worker was hired for 7 days. Each day, he was paid Tk. 10 more than what he was paid for the previous day of work. The total amount he was paid in the first 4 days of work equaled the total amount he was paid in the last 3 days. What was his starting pay?

The average daily wage of 10 workers is Tk.400. If the lowest wage is Tk.300, then what is the possible maximum wage?

A monkey climbs a 12-meters-high slippery pillar. In his first minute, he climbs 2 meters, and in the next minute, he slips one meter down. In this way, how much time will he take to reach the top of the pillar? What is the correct

A clock seen through a mirror, shows quarter past three. What is the correct time shown by the clock?

A batsman makes a score of 80 runs in the 16th innings and increases average by 3. What is his average after 16th innings?

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

A merchant has 1000 kg of sugar, part of which he sells at 8% and the remaining at 18% profit. He gains 14% on the whole. Find the quantity of sugar that he sold at 18% profit.

The average weight of A, B and C is 45 kg. If the average weight of A and B is 40 kg and that of B and C is 43 kg, then the weight of B is .