Practice30 Create account

The product of three rational numbers is 1. Two of them are $\frac{3}{5}$ and $- \frac{10}{9}$ .
What is the third number?

Class 8Operations on Rational NumbersRational Numbers

A $- \frac{3}{2}$
B $\frac{3}{2}$
C $- \frac{2}{3}$
D $\frac{2}{3}$

Step-by-Step Solution

Product of given two

= \frac{3}{5} \times (- \frac{10}{9}) = - \frac{30}{45} = - \frac{2}{3}

. Third

= 1 \div (- \frac{2}{3}) = - \frac{3}{2}

. Check:

- \frac{2}{3} \times - \frac{3}{2} = 1

.

Answer: A)

- \frac{3}{2}

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Operations on Rational Numbers practice questions

More Class 8 Operations on Rational Numbers practice

A jar is filled with sweets. Aarav takes 1/3 of them, then Diya takes 1/4 of the…Find the product: (-1/2 ) × (-1/3 ) × (-1/4 ).The temperature in Shimla fell by 2/3 degree C every hour for 3 hours. What was the…Vikram says: 'For any two rational numbers a and b, a - b = b - a.' Which single pair of…Evaluate using a property to make work easier: (-3/7 ) × 14/9 × (-7/3 ). What is the…