The integers 1,2,3,...40 are written on a blackboard.The following operation is then repeated 39 times.In each repeatition any two numbers ,say a and b,currently on the blackboard are erased and a new number a+b-1 is written.What will be the number left on the board then?
781
820
819
780
Consider obtuse angled triangles with sides 8cm,15cm and xcm.If x is an integer then how many such triangles exist?
5
21
10
15
Tap A and Tap B can fill a tank in 10 hours and 20 hours respectively. Tap C can empty the tank in 30 hours. Tap A and Tap B are opened for 5 hours. After that Tap C is opened. Find the total time taken in filling the tank upto 87.5% of its volume.
50/7 hours
85/14 hours
100/7 hours
95/14 hours
Arunanshu Pandey, Nitesh Ratre and Rahul Mittal are running on a circular track of length 300m. Pandey and Ratre are moving in the same direction while Mittal is moving in the opposite direction. Speed of Pandey,Ratre and Mittal are 4m/s,6m/s and 10m/s respectively. After how much time will all the three meet at the same point for the first time.
150 sec
150/8 sec
150/4 sec
150/2 sec
What is the least possible value of the function f(x,y). Given f(x,y)= 2x^2+3y^2+8x+24y+80
56
40
24
32
Rudrani buys 2 Apples, 3 Oranges and 4 Mangoes for Rs.20 and Prachi buys 4 Apples, 7 Oranges and 10 Mangoes for Rs. 50. Find the total price of 1 Apple, 1 Orange and 1 Mango.
Cannot be determined
Anand was talking to Megan Fox in a party. Referring to her father he said "I am his only daughter's son's maternal grandmother's son's brother in law". How is Anand related to Megan Fox??
Brother
Cousin
Husband
Father
What is the biggest number you can create usin four 1's?
1111
1^111
11^11
none of the above
how many zero's are at the end of 15!?
3
4
6
0,1,1,1,2,2,3,6,_,_guess the elements of series.
4,13
6,24
4,24
6,15