A boat goes 90 km upstream and comes back downstream to its original place in overall 16 hours. The speed of boat in still water is ‘x’ km/h. Find the value of ‘x’ if the speed of stream is 3 km/h.

Akash bought a laptop at Rs. ‘x’ and marked it 40% above cost price and sold it to Rajan after giving 15% discount thus made a profit of Rs. 9,880. What would have been his amount of profit or loss if he had sold it at 30% discount?

Raj and Raman can complete a task in (x – 10) days and (x + 10) days respectively while working individually. While working together, they can complete it in(4x-10)/8 days. In how many days can Raj complete the task alone?

A shopkeeper bought an article for Rs. ‘x’ and earned a profit of 20%. Had he bought it at Rs. 50 less and sold it for Rs. 30 more, he would have gained 32%. Find the value of ‘x’.

Vikram had 2 laptops in his shop with marked price of Rs. 50000 and Rs. 36000 respectively. He sold these laptops at ‘3x’% and ‘2x’% discount respectively. If the sum of their selling prices was Rs. 77120, then find x.

L, M and N started a business by investing Rs. ‘x’, Rs. 40000 and Rs. 90000 respectively. N withdrew Rs. 10000 at the end of 9th month. If L’s share of 1st year’s profit was 8/25 of the total 1st year’s profit, then what was the initial capital of L?

A, B and C together can complete a work in ‘x’ days, while A and B together can complete the same work in (x + 2) days. If C alone can complete the work in 24 days, then find the value of ‘x’.

What will come in place of the question mark (?) in the following series?

56, 57, 49, 76, ?, 137

In a certain code language, 'PQRS' is written as "HIJK'. How will 'XYZA' be written as in the same coding language? (RRB NTPC 2021 PYP)

Statements: I. All cars are eatable goods. II. All geysers are eatable goods. Conclusions: (i) Some cars are geysers. (ii) Some geysers are cars

Select the alphanumeric-cluster that can replace the question mark (?) in the following series, D4U, G9R, J160, ?

Statements: I. No woman is a cow. II. all Elif is a woman. Conclusions: (i) Elif is not a cow. (ii) Elif may or may not be a cow.

Select the number from among the given options that can replace the question mark (?) in the following series. 20, 90, 210, 380,?

Four options have been given, out of which three are alike in some manner and one is different. Select the odd one.

The profit earned on selling an article for Rs. 1225 is equal to the loss incurred on selling the same article for Rs. 475. At what price it should be sold to earn a profit of 40%?

Sahil started rowing his boat from point P against the stream for 30 minutes and then rowed back in the direction of the stream for next 30 minutes and reached point Q. If the distance between P and Q is 5 km, then find the speed of the stream.

If a positive number is increased by 10 then it becomes 1575 times of the reciprocal of the original number. Find the original number.

A man sold two books, one at a loss of 10% and other at a gain of 25%. If the cost price of each book is same, then find the overall profit/loss percentage in this transaction.

A solution containing 48 ml of acid and 52 ml of water is completely mixed with some quantity of 25% acid solution. If the ratio of acid to water in the final mixture is 3:5, then find the quantity of the 25% acid solution mixed to the initial solution.

A number is 31.25% of another number. When the smaller number is increased by 150, it becomes 50% of the larger number. Find the value of the larger number.