Secondary School (English Medium) (5 to 8) कक्षा ७ - CBSE Question Bank Solutions for Mathematics

Express the following in exponential form:

3 × 3 × 3 × a × a × a × a

Express the following in exponential form:

a × a × b × b × b × c × c × c × c

Express the following in exponential form:

s × s × t × t × s × s × t

Express the following numbers using exponential notations:

1024

Express the following numbers using exponential notations:

1029

Express the following numbers using exponential notations:

`144/875`

Identify the greater number in the following:

2⁶ or 6²

Identify the greater number in the following:

2⁹ or 9²

Identify the greater number in the following: 

7.9 × 10⁴ or 5.28 × 10⁵

Express the following as a product of powers of their prime factors:

9000

Express the following as a product of powers of their prime factors:

2025

Express the following as a product of powers of their prime factors:

800

Write the number of seconds in scientific notation.

The number of diagonals of an n-sided figure is `1/2(n^2 - 3n)`. Use the formula to find the number of diagonals for a 6-sided figure (hexagon).

Bacteria can divide in every 20 minutes. So 1 bacterium can multiply to 2 in 20 minutes. 4 in 40 minutes, and so on. How many bacteria will there be in 6 hours? Write your answer using exponents, and then evaluate.

Most bacteria reproduce by a type of simple cell division known as binary fission. Each species reproduce best at a specific temperature and moisture level.

Out of the following which is a 3-D figure?

Which of the following has a line of symmetry?

A solid with no vertex is ______.

A sphere has ______ vertex, ______ edge and ______ curved surface.

A circle has two lines of symmetry.