2, 6, 12, 20, 30, ___, 56

Answer Posted / lokescivil

answer is 42 because
(2*2)-2=4
(3*3)-3=6
(4*4)-4=12
(5*5)-5=25
(6*6)-6=30

(7*7)-7=?????????????

(8*8)-8=56
I think u have understood the logic

Is This Answer Correct ?    13 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

a train runs first half of the distance at 40 km/hr and the remaining half at 60 km/hr. What is the average speed for the entire journey?

915


0.75 * 0.75 * 0.75 - 0.001 0.75*0.75-0.075+0.01

1069


Which of the following is not a valid DEFINE GDG parameter a) OWNER b)LIMIT c) SCRATCH c)ALTER

1876


Ramesh sit around a round table with some other men. He has one rupee more than his right person and this person in turn has 1 rupee more than the person to his right and so on, Ramesh decided to give 1 rupee to his right & he in turn 2 rupees to his right and 3 rupees to his right & so on. This process went on till a person has 'no money' to give to his right. At this time he has 4 times the money to his right person. How many men are there along with Ramesh and what is the money with poorest fellow.

717


Rajdhani Express starts from Delhi at 12:00 pm and reaches Chandigarh at 2:30 pm and Doronto Express starts from Chandigarh at 12:15 and reach at Delhi at 2:15 . What will be the time when both the trains will cross each other?

719






If the equation x2 - 3x + a = 0 has the roots (0,1) then value of a is ?

730


A man travelled from the village to the post-office at the rate of 25 kmph and walked back at the rate of 4 kmph. If the whole journey took 5 hours 48 minutes, find the distance of the post-office from the village

645


Imagine a rectangle.Its length=2*width.A square of 1 inch is cut on all corners so that the remaining portion forms a box when folded.the volume of the box is_____ cubic inches.find the original dimensions of the box.

792


A Lorry starts from Banglore to Mysore At 6.00 a.m, 7.00 a.m, 8.00 a.m.....10 p.m. Similarly another Lorry on another side starts from Mysore to Banglore at 6.00 a.m, 7.00 a.m, 8.00 a.m.....10.00 p.m. A Lorry takes 9 hours to travel from Banglore to Mysore and vice versa.?

673


he hour hand lies between 3 and 4. Tthe difference between hour and minute hand is 50 degree.What are the two possible timings?

965


Sum of 5 consecutive numbers is 35. How many of the numers are prime:

710


A person gives a secret to two other persons in 5 minutes. How long will he take to tell the secret to 768 people?

896


all apscsc question papers

2051


Find the hypotenuse of a right angle isoceles triangle whose area is 50.

697


The ratio of cost price to the market price of an article is 4: 5. What is the profit percentage if the ratio of the profit percentage on selling the article to the discount allowed on it is 5: 4?

689