Triplet (x, y, z) is chosen from the set {1, 2, 3, ... , 25 }
such that x ≤ y Answers : a) 25c2 b) 600 c) 25c2 + 25c3 d) 1200
Please explain
How many natural numbers less than 100 when squared and then divided by 24 leave a remainder of 1?
Someone please give a complete solution for this.
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A man takes 4 hrs less to row down a 12 km stream than he takes to row up. For this 24 km round trip, if he doubles his rowing speed, he would take half an hour less to row downstream than to row upstream. Find the speed of the stream.
A. 0 km/h
B. 2 km/h
C. 4 km/h
D. 6 km/h
E. None of the above
Is there any way to solve this problem without using the usual way of forming equations?
A, B and C start running along the circumference of a circle (circumference = 1200 m) at the same time from the same point. A and B run in the clockwise direction with constant speeds of 8 m/s and 6 m/s respectively. C runs in the anti-clockwise direction with a constant speed of 5 m/s. What is the time difference between the first two instances when C is equidistant from A and B along the circumference?
a 120 b 50 c 60 d 100 (all seconds)
Please explain the approach to solve question n. 27
Twelve friends go out for a dinner where they find two circular tables,one with seven chairs and the other with 5 chairs. In how many ways can the group settle down themselves for dinner??
A shop sells ball point pens and refills. It used to sell refills for 50 paise each, but there were hardly any takers. When he reduced the price, the remaining refills were sold out enabling the shopkeeper to realize Rs. 35.89. How many refills were sold at the reduced price?
37
71
89
97
Which digit from the right is the first odd digit in the number 340^235?
A and B moves towards each oyher in the speed of ratio 5:4.at first they cross each other for the 1 st time..then after completing the path they again moves towards each other to and fro and this process continues. at how many distinct point they cross each other? Approach plz
There are 8 adjacent sectors in a circle and their total area is 1/3rd the area of the circle . If the area of the gth sector is 3 times the area of the (g-1) th sector , for g = 2,3...9 what is the approximate angle of the 9 th sector in radians ?
- 4pi9
- pi/3
- 5pi/9
- pi/2
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A candidate takes a test and attempts all the 100 questions in it. While any correct answer fetches 1 mark, wrong answers are penalised as follows; one-tenth of the questions carry 1/10 negative mark each, one-fifth of the questions carry 1/5 negative marks each and the rest of the questions carry 1/2 negative mark each. Un¬attempted questions carry no marks. What is the difference between the maximum and the minimum marks that he can score?
a)100 b) 120 C)140 d) none of these
Approach
If N = 1! - 2! + 3! - 4! +.....+ 47! - 48! + 49!, then what is the unit digit of N N ?
in a kilometer race a beats b by 15 sec and b beats c by 15 sec. if c is 100 m away from finishing mark,when b has reached it. find speed of A?
The Sinhagad expressand the Gomati express consisting of 41 and 42 carriages respectively are travelling at 36km/h in opposite directions.. The carriage length (including inter-carriage lengths averaged over number of carriages ) averages 10 m and is half the engine length.If the trains crosses each other on parallel tracks , in how much time will they complete the crossing
1 min 20 seconds
42 seconds
38 seconds
40 seconds
Answer is 38 seconds
Two cards are drawn randomly from a deck of 52 playing cards. What is the probability that both of them are face cards but of different suits?a 9/221b 18/221c 9/663d 12/663
How have the following two concepts been derived?
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