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

87, 136, 257, 426, ?, 1076

A and B can do a work in 30 hours and 50 hours respectively. If A starts the work and worked for only 12 hours and then the remaining work is completed by B alone, then in how many hours will the work be completed?

A car can cross a bridge (72 m long) in 7.2 seconds and a pole in 2.4 seconds. Find the speed of the car.

The simple interest earned on Rs. (x – 4125) invested at 8% p.a. for 2 years is half of the interest earned if Rs. ‘x’ is invested at 10% p. a compound interest for 2 years compounded annually. Find the value of x.

The speed of a boat in still water is 3 times of the speed of the stream. A boat takes 2.5 hours to cover a distance of 30 km upstream. Find the time taken by boat to cover the distance of 36 km downstream.

A person has Rs. 15600 and he gives 20% of his money to his son and rest to his daughter and wife in the ratio of 2:3, respectively. Find the amount that he gives to his wife.

The following numbers form a series. Find the odd one out.

7, 15, 31, 63, 87, 127

A and C together can complete a work in ‘x’ days while B alone can complete the same work in ‘x – 2’ days. If A, B, and C, while working together can complete the work in (60/11) days, then find the value of ‘x’.

A biker travels at a speed of 32 km/hr for 6 hours each day on all days except Sunday. If his journey starts on a Wednesday, on which day will he reach his destination 2500 km away?

Abhishek invested Rs. 18,000 in a scheme offering x% simple interest for ‘x’ years. Interest earned by him after ‘x’ years is Rs. 11520. Find the simple interest earned by him, if he invested Rs. 8,000 at same rate of interest for four years.

Arun invested a certain sum at a rate of 20%, compounded annually for 2 years and received an interest of Rs. 3520. Find the interest received if the same amount is invested at 15% simple interest for 3 years.

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

400, 394, 378, 352, 316, ?

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

18, 31, 42, 49, 54, ?