In following number series, two terms have been put within brackets. Choose the appropriate option

Choose the appropriate option 2, 3, (6), 11, 18, (30), 38

Choose the appropriate option 2, 3, (6), 11, 18, (30), 38

The correct sequence is + 1, + 3, + 5, + 7, + 9, + 11.

Clearly, the term 6 is correct,

But, 30 is wrong and should be replaced by (18 + 9) i.e. 27.

George is it is more than Christopher and ford is 2 years younger than Christopher the sum of their ages is 60. Find the age of George?

let's

Christopher = x

George = 8 x

Ford = x - 2

Given condition

x + 8 + 2 + x - 2 = 60

3 x + 8 - 2 = 60

3 x = 60 - 6

x = 54 / 3

x =18

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IF a catamaran travel at a speed of 20 km per hour in stillwater. So when it travel at a downstream speed 5 kilometre per hour. What will be the time taken by it to travel 90 km.

Since the catamaran is travelling in downstream the speed of the stream as a pin the speed of the ship so its speed is equals to catamaran speed+downstream speed. Which becomes 20+5=25 km/he. Now by applying a formula we get

Time=90/25. We get our answer which is 3.6

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the ages of two person differ by 12 years. 6 years ago the elder one was 3 years as old as younger one. What is the present age of elder person ?

Let age of elder person=x

Age of younger person =x-12

(x-6)=3(x-12-6)

(x-6)=3x-54

-6+54=3x-x

48=2x

x=48/2

24

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