In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.

519, 535, 551, 567, 585, 599

In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.

44, 57, 65, 86, 114, 149

In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.

50, 75, 125, 150, 300, 425

In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.

12, 12, 36, 180, 1250, 11340

In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.

80, 480, 2400, 9600, 28400, 57600

The sum of the monthly incomes of ‘A’, ‘B’ and ‘C’ is Rs. 50000 which is 4 times the monthly income of ‘C’. If ‘A’ spends 55% of his income while ‘B’ spends 80% of his income and the sum of their savings is Rs. 15000, then find the savings of ‘A’.

The ratio of the cost price and marked price of an article is 6:11, respectively. The article is sold after giving a discount of Rs. 450 such that there is a profit of 50%. Find the amount by which the article is marked up above its cost price.

A & B began a business with Rs 25000 & Rs 15000, resp. The no. of months invested by B was four less than that of by A. Find the no. of months that B invested in the firm if the ratio of total profit to A's share of profit was 7:5?
(LIC Asst. pre 2016)

Perimeter of a square and circumference of a circle are in the ratio 7:11, respectively. If area of the square is 49 cm^2, then find the radius of the circle. (Take π = 22/7)
(RBI Asst. Pre 2016)

The average of 10 numbers is 21.8. The average of the last four numbers is 15. If the average of the first five numbers is 23, then what is the value of the sixth number?
(RBI Asst. Pre 2016)

Ten years ago, the average age of five employees was 35 years. The present average age is 45 years after the inclusion of two new employees. Find the present average age of two new employees.
(RBI Assist. 2022)

Sumit can swim 12 km upstream and 16 km downstream in 5 hours. If ratio of speed of stream to that of speed of Sumit in upstream is 1:2, then find the speed of Sumit in still water.
(RBI Assist. Pre 2022)

What will come in place of the question mark (?) in each of the following series?
1 6 13 24 41 ?
(RBI Assist. Pre 2022)

A question is given to Saket, Ankush and Prem. Probability that Saket, Ankush and Prem can solve the question is 1/3, 2/5 and 1/2. Find the probability that the question will be solved.
(RBI Assist. Pre 2022)

What will come in place of the question mark (?) in each of the following series?
2 5 16 65 326 ?
(RBI Assist. pre 2022)

A gardener uses cylindrical roller of diameter 7 cm and length 28 cm to flatten a rectangular field of dimension 280cm × 165 cm. Find the number of revolutions made by the roller to flatten the entire field?
(RBI Assist. Pre 2022)

What will come in place of the question mark (?) in each of the following series?
3 12 48 192 768 ?
(RBI Assist. pre 2022)