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Published on: 13/05/2022
QB365 provides detailed and simple solution for every book back questions in class 7 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
latest Book back QuestionsDownload Tamil Nadu 7th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
The pathway of a square paddy field has 5 m width and length of its side is 40 m. Find the total area of its pathway. (Note: Use suitable identity)
2.
Evaluate the following, using suitable identity.
472
3.
Evaluate the following, using suitable identity.
1032
4.
Express the following as the product of its factor 24 ab2c2.
1.
Area of the path way = Area of the outer square - Area of the inner square
= (50)2 - (40)2 sq.m
[a2-b2 = (a + b) (a - b)]
= (50 + 40 ) ( 50 - 40 ) sq.m
= 90 x 10 = 900 sq.m
Total area of the path = 900 sq.m
2.
472= (50 - 3)2
Substitute a = 50 and b = 3 in the identity
(a-b)2 = a2-2ab + b2
(50 - 3)2 = 502-2 x 50 x 3 + 32
= 2500 - 300 + 9
= 2209
3.
1032 = (100 + 3)2
Substitute a = 100 and b = 3 in the identity
(a + b)2 = a2 + 2ab + b2
(100 + 3)2 = 1002+ 2 x 100 x 3 + 32
= 10000 + 600 + 9
= 10609
4.
= 2 x 2 x 2 x 3 x a x b x b x c x c
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Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards