1. In woods there were certain birds on each tree .Number of birds on each tree are equal to total number of trees in the woods.There are 2000-2100 birds altogether in the woods.How many trees are there in the woods? ( 3 marks )

Answer :

let number of birds on each tree = X = number of trees in the woods.

Then total number of birds in woods = X^ 2. = in between 2000-2100.

This number should be a perfect square.there is only one number in that range which is

2025.=45^2.

So total number of trees = 45. ( 100% sure )

2. The man gave Rupees hanger+painter=1100
paniter +plumber=1700 and other such equations we have to find out individual amount given for each person ?

Approach : Form simultaneous equations n solve

3. There was a race going. The participants are Dennis, jack, samatha, Jim, Louise. Louise was not the last person. Dennis beat jack. Samantha was beaten by Jim and Louise in that order. Jack was not the first person. Jack beat Jim. Who is the winner?

Answer : Dennis.
Order was: Dennis, jack, Jim, Louise, Samantha

4. A boy goes to school from his house. on one fourth oh his way to school, he crosses a machinery station. And on one third of his way to school, he crosses a Railway station. He crossed the machinery station at 7:30 and he crosses the Railway station at 7:35. When does he leave the house & when does he reach the school ?

Answer : he leave his house from 7:15 and reach the school to 8:15

Approach :

1/3-1/4=1/12 he covered in (7:35-7:30) 5min

So 1km will cover in 60 min

And 1/4km will cover in 15 min... So 7.30-0:15=7:15 and 7:15+0:60=8:15

5) Two pipes r filling the tank 10 min and 15 min respectively. And the tank is having leak and it is taking 7 1/2 minutes to empty the tank. Three r simaltaneosuly opened and how much time it will take to fill the tank.

Answer :

1/10 +1/15 - 2/15
= 30 min

6) Ann, Carol, Eve are friends. Ann will wear blue if and only if eve wears red. Ann and carol can wear red but not on the same day. Carol and eve can wear blue but not on the same day. Find Ann dress color? ( 6 marks )

Answer : blue (100% Sure)

7. A passenger train requires the time to overtake a freight train which is double than the time it takes to cross the train when it is coming from opposite direction.how much faster is the passenger trains compared 2 freight train?

Answer : Double

8. There are 3 tribes. Sorobean aways speaks truth. Narobean alwaz lies. Midorean speaks truth and false alternatively but whether he speaks truth or lies first cannot be detemined.

From the statements find who belongs to which tribe.

A: I am a sorobean
B is a narobean

B: I am a sorobean
C is a midorean

C: I am a sorobean
A is a midorean

Answer : A-Midorean, B - Narobean, C - Sorobean

9) there are 2 colours of bananas of which a bunch of red colour bananas cost 40 cents and a bunch of blue colour bananas cost 30 cents.if I would bought some bananas for some amount then I will get 2 more bunches than I had got if I divide the amount equally.then for what amount I would have bought the bananas? ( 6 marks )

Answer : 120 cents ( LCM of 30 and 40 ) I think it is wrong check it.

10) someones driving a car.. sees a mile stone with a two digit no. on it (km)… after one hour sees a mile stone with the same digits but in reversed order… again after one hour he sees the no. back again wid a 0 in the middle.. find the speed of the car..

Answer : 45km/hr