Bank Math

A boat runs at 22 km hour along the stream and 10 km per hour against the stream. Find the ratio of the speed of the boat in still water to that of the speed of the stream.

If x is 30% greater than y, what percent of y is x?

A train 240m long passes a pole in 24 seconds. How long will is take to pass a platform 650m long?

The average of several exam scores is 80. One make-up exam was given. Included with the other scores. The new average was 84. If the score on the make up exam was 92, how many total exams were given?

The radius of a circle is increased so that in circumference increased by 5%. The area of the circle will be increased by-

3640 ÷ 14 × 16 + 340 = ?

ফারহানের জন্মদিন 29 ফেব্রুয়ারি। তাঁর জন্ম গ্রহণের সালটি হতে পারে

If a > b > 1, then which of the following is true?

The man was carrying a _____ bag.

A, B and C each working alone can complete a job in 6, 8 and 12 days respectively. If all three of them work together to complete the job and earn $2340, what will be C's share of the earnings?

If A and B are in the ratio 3 : 4, and B and C are in the ratio 12 : 13. Then A and C will be in the ratio:

Worker P is 50% as efficient as worker Q. Worker R does half of the work done by P and Q together. If R alone does the work in 40 days, then P, Q and R together can do the work in -

The average of the two numbers is 6.5 and square root of their product is 6. What are the numbers?

A trader marks his goods at 20% above the cost price . If he allows a discount of 5% for each down payment, his profit for such a transaction is 

In how many years, Tk. 150 will produce the same interest @ 8% as Tk. 800 produce in 3 years @ (9/2)% ?

The three rational numbers between 3 and 4 are :

The three sides of a triangle are x + 1, 2x - 1 and 3x + 1 respectively and the perimeter is 25cm. The length of the smallest side is-

Chose the pair of numbers which comes next: 75, 65, 85, 55, 45, 85, 35, _______

There are 2 shirts, 3 jeans, 3 socks and 2 skirts. In how many ways shopkeeper can arrange these things so that all the socks come together and all the skirts come together? 

Choose the one that will be best fit in the blank position?
ELFA, GLHA, ILJA,______, MLNA