(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

The fahrenheit temperature, F is 32 more than nine -fifths of the centigrade temperature C. Express this relation by a formula.

The arithmetic mean M of the five numbers a, b, c, d, e is equal to their sum divided by the number of quantities. Express it as a formula.

Make a formula for the statement:"The reciprocal of focal length f is equal to the sum of reciprocals of the object distance u and the image distance v."

Make a formula for the statement:"The number of diagonals, d, that can be drawn from one vertex of an n sided polygon to all the other vertices is equal to the number of sides of the polygon less 3"

The area A of a circular ring is π times the difference between the squares of outer radius R and inner radius r. Make a formula for this statement.

A man bought 25a articles at 30p paisa each and sold them at 20q paisa each. Find his profit in rupees.

How many minutes are there in x hours, y minutes and z seconds.

Apple cost x rupees per dozen and mangoes cost y rupees per score. Write a formula to find the total cost C in rupees of 20 apples and 30 mangoes.

Make R the subject of formula A = `"P"(1 + "R"/100)^"N"`

Make L the subject of formula T = `2pisqrt("L"/"G")`

Make a the subject of formula S = `"ut" + (1)/(2)"at"^2`

Make x the subject of formula `"a"x^2/"a"^2 + y^2/"b"^2` = 1

Make a the subject of formula S = `("a"("r"^"n" - 1))/("r" - 1)`

Make r₂ the subject of formula `(1)/"R" = (1)/"r"_1 + (1)/"r"_2`

Make a the subject of formula x = `sqrt(("a" + "b")/("a" - "b")`

Make y the subject of formula W = `"pq" + (1)/(2)"wy"^2`

Make N the subject of formula I = `"NG"/("R" + "Ny")`

Make V the subject of formula K = `(1)/(2)"MV"^2`

Make d the subject of formula S = `"n"/(2){2"a" + ("n" - 1)"d"}`

Make R₂ the subject of formula R² = 4π(R₁² - R₂²)