Practice30 Create account

Farhan has started this factor tree for 72. When every branch ends in a prime, how many times will the prime 2 appear at the ends of the branches?

Class 6Prime and Composite NumbersPlaying with Numbers

A2
B1
C3
D4

Step-by-Step Solution

4 = 2 \times 2

and

9 = 3 \times 3

, so

72 = 2 \times 2 \times 2 \times 3 \times 3

. The prime 2 appears 3 times (one already shown, two from the 4).

Answer: C) 3

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 Prime and Composite Numbers practice questions

More Class 6 Prime and Composite Numbers practice

Ravi says, "Every prime number is odd." Which card proves him wrong?Two numbers are co-prime if their only common factor is 1. How many of the card pairs…Add all the prime numbers in the yellow part of the strip. What is the sum?Sonal crossed out 1 and every multiple of 2, 3 and 5 except 2, 3 and 5 themselves. One…Which of the following is a prime number?