Question
Find the missing number in the given number series.
/> 2, 5, 11, 23, 47, ?Solution
ATQ,
First differences:
Pattern: ×2 +1, ×2 +1, ...
2 × 2 + 1 = 5
5 × 2 + 1 = 11
11 × 2 + 1 = 23
23 × 2 + 1 = 47
47 × 2 + 1 = 95
Hence, missing number is 95
Sum of first 10 terms of a GP is equal to the sum of the first 12 terms in the same GP. Sum of the first 15 terms is 31, what is the third term in the GP?
A well with 30 metre inner diameter is dug 6 m deep. Earth taken out of it, has been evenly spread all around it to a width of 15 m to form an embankmen...
A wire is moulded into a circle of radius 21m. Then the wire is bent and shaped into a rectangle of length 36 m. Find the area of the rectangle thus for...
If the volume of a cylinder is 180Ï€ and the ratio of radius to its height is 6:5 then find the curved surface area of cylinder?
The breadth of a rectangle is increased by 5 cm, it will become twice the length of the rectangle. If the new perimeter is 312 cm, then find the origina...
Find total surface area of a cylinder of radius 7 cm and height 10 cm. (Ï€ = 22/7)
A rectangular paper sheet of dimensions 22cm×12cm is folded in the form of a cylinder along its length. what will be the volume of this cylinder? Take ...
The difference between the length and breadth of a rectangle is 25 m. If its perimeter is 206 m, then its area is
The circumference of a circle is 88 cm and the length of the rectangle is 4 times the radius of the circle. Find the area (in cm2) of the rec...
- A room has a floor covered with rectangular tiles, each measuring 80 cm by 60 cm. Given that the room's dimensions are 5.6 meters in length and 240 centime...
Relevant for Exams:
