Algebra

If each matchbox contains 50 matchsticks, the number of matchsticks required to fill n such boxes is-

• 50 + n

• 50 - n

• 50n

• 50/n

Amulya is x years of age now, 5 years ago her age was-

• 5 - x

• x + 5

• x - 5

• 5x

In algebra, letters may stand for

• known quantities

• unknown quantities

• fixed numbers

• none of these

p kg of potatoes cost Rs. 70. Cost of 1 kg of potatoes is-

• 70 + p

• 70 - p

• 70p

• 70/p

The speed of a car is 80 kmph. Find the distance (in km) travelled by the car if it is travelled for h hours.

• 80 h

• 80/h

• 80 + h

• h/80

s increased by 3

• s - 3
• 3s
• s + 3
• s / 3

A symbol for an unknown value is called a _______________. It is usually a letter such as a, X or Y.

• Constant
• Coefficient
• Operator
• Variable

Think of a number x. Multiply it by 3 and add 5 to the product

• 5x+3

• x+5+3

• 3x+5