Question

in figure 15.14, angle AOC is equal to 90 degree and OA and OD are opposite rays.BOE is a line. now write : 1. a pair of adjacent angles, 2. a linear pair, 3. a pair of vertically opposite angle, 4. a pair of supplementary angles, 5. a pair of complementary angle.​

Answer 1

Answer:

Solution

i): ∠BOC and ∠AOD are obtuse vertically opposite angles.

ii): ∠AOB and ∠AOE are adjacent complementary angles.

iii): ∠EOB and ∠EOD are equal supplementary angles.

iv): ∠EOA and ∠EOC are unequal supplementary agnles.

v): ∠AOB and ∠AOE, ∠AOE and ∠EOD, ∠EOD and ∠COD are adjacent angles but do not form a linear pair.

Answer 2

Answer:

53 + 47 = 100 : simples? But those itching for their Good Will Hunting moment, the Guinness Book of Records puts Goldbach's Conjecture as the current longest-standing maths problem, which has been around for 257 years. It states that every even number is the sum of two prime numbers: for example, 53 + 47 = 100.search-icon-image

Question

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Fifteen postcards cost Rs. 2.25. What will be the cost of 36 postcards? How many postcards can we buy in Rs. 45

Medium

Solution

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15 postcards costs =Rs. 2.25

1 postcard will cost =Rs.

15

2.25

=0.15

36 postcards will cost =Rs.0.15×36

=Rs 5.40

And

In Rs. 2.25 we can buy =15 postcards

In Rs. 1 we can buy =

2.25

15

postcards

In Rs. 45 we can buy =

2.25

15

×45 postcards

=300 postcardsFifteen post cards cost Rs 2.25. How many postcards can we buy in Rs 45?