- Three numbers in the ratio of 1: 2: 3 and their L.C.M is 120. Find their H.C.F?
10

15

20

25

30

Option C

Let the number be x, 2x,3x. So H.C.F is x. L.C.M of x, 2x, 3x= 6x.

6x =120 => x= 20.

- The ratio between two number is 6:5 if their HCF is 10. Then the numbers are.
10,20

60,50

20,60

20,50

40,50

Option B

Let the number be 6x, 5x

HCF of 6x,5x=x

ie) x=10(given)

Then the numbers are 6x,5x=60,50

- Find the average of first 14 natural number.
100

105

200

205

300

Option B

average of first n natural number=n(n+1)/2

here n=14

average=14(14+1)/2=7×15=105

- The sum of ages of three sister born of the intervals of 2 years each is 42 years. What is the age of the youngest sister ?
10

11

12

13

14

Option C

x+(x+2)+(x+4)=42 (given the intervals are 2 years)

3x+6=42 x =36/2=12

Age of the youngest sister=12 years

- Cost of a mobile is Rs .5000 and selling price is Rs. 7000.What is the profit percent?
20

30

40

50

60

Option C

Profit % = p/c.p x 100

=2000/5000 x 100

P%=40

- Ganesh can do a task in 4days . Prem can do a task in 3 days. How long if will take if both Ganesh & Prem work together?
1 d 5 hr

2 d 5 hr

5 d 2 hr

4d 6hr

2 d 6 hr

Option A

Ganesh 1day work=1/4

Prem 1day work =1/3

(Ganesh+Prem) =1/4+1/3=7/12

So Ganesh& Prem will complete in 12/7=1 5/7=1day 5hrs together.

- If a boat travels with a speed 25km/hr in still water and the speed of stream is 5km/hrs . What would be the time taken by boat to go 40 km upstream?
2

3

4

5

6

Option A

Upstream speed = x-y km/hr

=25-5=20 km/hr

T=distance/speed

T=40/20=2hrs

- What is the simple interest on Rs 60000 at 5 ½% per annum for 2 years?
4300

5500

6600

4400

5500

Option C

S.I = P X R X T/100=60000 x 5 ½ x 2/ 100

S.I=Rs 6600

- Ram deposits Rs .20,000 for 2years with 5% compound interest. What amount will be get at last?
Rs .22050

Rs .32050

Rs .52050

Rs .20050

Rs .12050

Option A

Amount= P x (1+r/100)n

=20000 X (1+5/100)2

=20000 x 105/100)2

=20000x 105×105/10000

=Rs .22050

- A florist choose one rose at random from the basket which have rainbow colors of roses. what is the probability of choosing yellow color rose?
1/7

1/5

1/4

1/3

1/2

Option A

S=(rainbow color roses)

S=(V,I,B,G,Y,O,R)=N(S)=7

P(Yellow rose)=P(S)/N(S)=1/7 (Only one yellow rose)