Secondary School (English Medium) (5 to 8) Class 7 - CBSE Question Bank Solutions for Mathematics

The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 10.

The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 19.

If = 2x + 3,  = `3/2x + 7` and  = x – 3 then find the value of:

² + –

If = 2x + 3,  = `3/2x + 7` and  = x – 3 then find the value of:

^`1/2` + – 3

If = `3/4x - 2` and = x + 6, then find the value of:

–

If = `3/4x - 2` and = x + 6, then find the value of:

2 – `3/2`

Write an expression for the sum of 1 and twice a number n. If you let n be any odd number, will the result always be an odd number?

x is a non-zero rational number. Product of the square of x with the cube of x is equal to the ______.

a^m × aⁿ  is equal to ______.

If 2¹⁹⁹⁸ – 2¹⁹⁹⁷ – 2¹⁹⁹⁶ + 2¹⁹⁹⁵ = k.2¹⁹⁹⁵, then the value of k is ______.

Square of `((-2)/3)` is ______.

Which of the following is not true?

`(-2)^31 xx (-2)^13 = (-2)^-`.

`(11/15)^4 xx (_)^5 = (11/15)^9`

`a^6 xx a^5 xx a^0 = a^-`

1⁰ × 0¹ = 1

(10 + 10)¹⁰ = 10¹⁰ + 10¹⁰

x^m + x^m = x^2m, where x is a non-zero rational number and m is a positive integer.

x^m × y^m = (x × y)^2m, where x and y are non-zero rational numbers and m is a positive integer.

x^m × xⁿ = x^{m + n}, where x is a non-zero rational number and m, n are positive integers.